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2011-03-09x86, UV: Initialize the broadcast assist unit base destination node id properlyCliff Wickman
The BAU's initialization of the broadcast description header is lacking the coherence domain (high bits) in the nasid. This causes a catastrophic system failure when running on a system with multiple coherence domains. Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1PxKBB-0005F0-3U@eag09.americas.sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-09x86: Remove dead config option X86_CPUJan Beulich
This isn't being referenced anywhere, and the selects done from it can be easily done together with all the other X86 ones. v2: Also adjust UML's Kconfig.x86. Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <4D7603DA02000078000351C1@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-09Merge commit 'v2.6.38-rc8' into x86/asmIngo Molnar
Merge reason: Update with the latest fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-09x86: Fix binutils-2.21 symbol related build failuresSedat Dilek
New binutils version 2.21.0.20110302-1 started checking that the symbol parameter to the .size directive matches the entry name's symbol parameter, unearthing two mismatches: AS arch/x86/kernel/acpi/wakeup_rm.o arch/x86/kernel/acpi/wakeup_rm.S: Assembler messages: arch/x86/kernel/acpi/wakeup_rm.S:12: Error: .size expression with symbol `wakeup_code_start' does not evaluate to a constant arch/x86/kernel/entry_32.S: Assembler messages: arch/x86/kernel/entry_32.S:1421: Error: .size expression with symbol `apf_page_fault' does not evaluate to a constant The problem was discovered while using Debian's binutils (2.21.0.20110302-1) and experimenting with binutils from upstream. Thanks Alexander and H.J. for the vital help. Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com> Cc: Alexander van Heukelum <heukelum@fastmail.fm> Cc: H.J. Lu <hjl.tools@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Rafael J. Wysocki <rjw@sisk.pl> LKML-Reference: <1299620364-21644-1-git-send-email-sedat.dilek@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-08kprobes: Disabling optimized kprobes for entry text sectionJiri Olsa
You can crash the kernel (with root/admin privileges) using kprobe tracer by running: echo "p system_call_after_swapgs" > ./kprobe_events echo 1 > ./events/kprobes/enable The reason is that at the system_call_after_swapgs label, the kernel stack is not set up. If optimized kprobes are enabled, the user space stack is being used in this case (see optimized kprobe template) and this might result in a crash. There are several places like this over the entry code (entry_$BIT). As it seems there's no any reasonable/maintainable way to disable only those places where the stack is not ready, I switched off the whole entry code from kprobe optimizing. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: acme@redhat.com Cc: fweisbec@gmail.com Cc: ananth@in.ibm.com Cc: davem@davemloft.net Cc: a.p.zijlstra@chello.nl Cc: eric.dumazet@gmail.com Cc: 2nddept-manager@sdl.hitachi.co.jp LKML-Reference: <1298298313-5980-3-git-send-email-jolsa@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-08x86: Separate out entry text sectionJiri Olsa
Put x86 entry code into a separate link section: .entry.text. Separating the entry text section seems to have performance benefits - caused by more efficient instruction cache usage. Running hackbench with perf stat --repeat showed that the change compresses the icache footprint. The icache load miss rate went down by about 15%: before patch: 19417627 L1-icache-load-misses ( +- 0.147% ) after patch: 16490788 L1-icache-load-misses ( +- 0.180% ) The motivation of the patch was to fix a particular kprobes bug that relates to the entry text section, the performance advantage was discovered accidentally. Whole perf output follows: - results for current tip tree: Performance counter stats for './hackbench/hackbench 10' (500 runs): 19417627 L1-icache-load-misses ( +- 0.147% ) 2676914223 instructions # 0.497 IPC ( +- 0.079% ) 5389516026 cycles ( +- 0.144% ) 0.206267711 seconds time elapsed ( +- 0.138% ) - results for current tip tree with the patch applied: Performance counter stats for './hackbench/hackbench 10' (500 runs): 16490788 L1-icache-load-misses ( +- 0.180% ) 2717734941 instructions # 0.502 IPC ( +- 0.079% ) 5414756975 cycles ( +- 0.148% ) 0.206747566 seconds time elapsed ( +- 0.137% ) Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: masami.hiramatsu.pt@hitachi.com Cc: ananth@in.ibm.com Cc: davem@davemloft.net Cc: 2nddept-manager@sdl.hitachi.co.jp LKML-Reference: <20110307181039.GB15197@jolsa.redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-08Merge commit 'v2.6.38-rc8' into perf/coreIngo Molnar
Merge reason: Merge latest fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-08KEYS: Add an iovec version of KEYCTL_INSTANTIATEDavid Howells
Add a keyctl op (KEYCTL_INSTANTIATE_IOV) that is like KEYCTL_INSTANTIATE, but takes an iovec array and concatenates the data in-kernel into one buffer. Since the KEYCTL_INSTANTIATE copies the data anyway, this isn't too much of a problem. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
2011-03-05x86: Really print supported CPUs if PROCESSOR_SELECT=yJan Beulich
I'm sure it was a mere oversight that the CONFIG_ prefixes are missing. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Dave Jones <davej@redhat.com> LKML-Reference: <4D7118D30200007800034F79@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-05Merge branch 'x86-mm' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into x86/mm
2011-03-05perf: Avoid the percore allocations if the CPU is not HT capableLin Ming
Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1299119690-13991-5-git-send-email-ming.m.lin@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-04x86-64, NUMA: Don't assume phys node 0 is always online in numa_emulation()Tejun Heo
Undetermined entries in emu_nid_to_phys[] are filled with zero assuming that physical node 0 is always online; however, this might not be true depending on hardware configuration. Find a physical node which is actually online and use it instead. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: David Rientjes <rientjes@google.com> LKML-Reference: <alpine.DEB.2.00.1103020628210.31626@chino.kir.corp.google.com>
2011-03-04x86, numa: Fix numa_emulation code with memory-less node0Yinghai Lu
This crash happens on a system that does not have RAM on node0. When numa_emulation is compiled in, and: 1. we boot the system without numa=fake... 2. or we boot the system with numa=fake=128 to make emulation fail we will get: [ 0.076025] ------------[ cut here ]------------ [ 0.080004] kernel BUG at arch/x86/mm/numa_64.c:788! [ 0.080004] invalid opcode: 0000 [#1] SMP [...] need to use early_cpu_to_node() directly, because cpu_to_apicid and apicid_to_node will return node0 that is not onlined. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Tejun Heo <tj@kernel.org> Cc: David Rientjes <rientjes@google.com> LKML-Reference: <4D6ECF72.5010308@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-04x86-64, NUMA: Clean up initmem_init()David Rientjes
This patch cleans initmem_init() so that it is more readable and doesn't use an unnecessary array of function pointers to convolute the flow of the code. It also makes it obvious that dummy_numa_init() will always succeed (and documents that requirement) so that the existing BUG() is never actually reached. No functional change. -tj: Updated comment for dummy_numa_init() slightly. Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2011-03-04x86-64, NUMA: Fix numa_emulation code with node0 without RAMYinghai Lu
On one system that does not have RAM on node0. When numa_emulation is compiled in, and 1. boot system without numa=fake... 2. or boot system with numa=fake=128 to make emulation fail will get: [ 0.092026] ------------[ cut here ]------------ [ 0.096005] kernel BUG at arch/x86/mm/numa_emulation.c:439! [ 0.096005] invalid opcode: 0000 [#1] SMP [ 0.096005] last sysfs file: [ 0.096005] CPU 0 [ 0.096005] Modules linked in: [ 0.096005] [ 0.096005] Pid: 0, comm: swapper Not tainted 2.6.38-rc6-tip-yh-03869-gcb0491d-dirty #684 Sun Microsystems Sun Fire X4240/Sun Fire X4240 [ 0.096005] RIP: 0010:[<ffffffff81cdc65b>] [<ffffffff81cdc65b>] numa_add_cpu+0x56/0xcf [ 0.096005] RSP: 0000:ffffffff82437ed8 EFLAGS: 00010246 ... [ 0.096005] Call Trace: [ 0.096005] [<ffffffff81cd7931>] identify_cpu+0x2d7/0x2df [ 0.096005] [<ffffffff827e54fa>] identify_boot_cpu+0x10/0x30 [ 0.096005] [<ffffffff827e5704>] check_bugs+0x9/0x2d [ 0.096005] [<ffffffff827dceda>] start_kernel+0x3d7/0x3f1 [ 0.096005] [<ffffffff827dc2cc>] x86_64_start_reservations+0x9c/0xa0 [ 0.096005] [<ffffffff827dc4ad>] x86_64_start_kernel+0x1dd/0x1e8 [ 0.096005] Code: 74 06 48 8d 04 90 eb 0f 48 c7 c0 30 d9 00 00 48 03 04 d5 90 0f 60 82 8b 00 83 f8 ff 74 0d 0f a3 05 8b 7e 92 00 19 d2 85 d2 75 02 <0f> 0b 48 98 be 00 01 00 00 48 c7 c7 e0 44 60 82 44 8b 2c 85 e0 [ 0.096005] RIP [<ffffffff81cdc65b>] numa_add_cpu+0x56/0xcf [ 0.096005] RSP <ffffffff82437ed8> [ 0.096026] ---[ end trace a7919e7f17c0a725 ]--- We need to use early_cpu_to_node() directly, because numa_cpu_node() will return node0 that is not onlined. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Tejun Heo <tj@kernel.org>
2011-03-04perf: Fix LLC-* events on Intel Nehalem/WestmereAndi Kleen
On Intel Nehalem and Westmere CPUs the generic perf LLC-* events count the L2 caches, not the real L3 LLC - this was inconsistent with behavior on other CPUs. Fixing this requires the use of the special OFFCORE_RESPONSE events which need a separate mask register. This has been implemented by the previous patch, now use this infrastructure to set correct events for the LLC-* on Nehalem and Westmere. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1299119690-13991-3-git-send-email-ming.m.lin@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-04perf: Add support for supplementary event registersAndi Kleen
Change logs against Andi's original version: - Extends perf_event_attr:config to config{,1,2} (Peter Zijlstra) - Fixed a major event scheduling issue. There cannot be a ref++ on an event that has already done ref++ once and without calling put_constraint() in between. (Stephane Eranian) - Use thread_cpumask for percore allocation. (Lin Ming) - Use MSR names in the extra reg lists. (Lin Ming) - Remove redundant "c = NULL" in intel_percore_constraints - Fix comment of perf_event_attr::config1 Intel Nehalem/Westmere have a special OFFCORE_RESPONSE event that can be used to monitor any offcore accesses from a core. This is a very useful event for various tunings, and it's also needed to implement the generic LLC-* events correctly. Unfortunately this event requires programming a mask in a separate register. And worse this separate register is per core, not per CPU thread. This patch: - Teaches perf_events that OFFCORE_RESPONSE needs extra parameters. The extra parameters are passed by user space in the perf_event_attr::config1 field. - Adds support to the Intel perf_event core to schedule per core resources. This adds fairly generic infrastructure that can be also used for other per core resources. The basic code has is patterned after the similar AMD northbridge constraints code. Thanks to Stephane Eranian who pointed out some problems in the original version and suggested improvements. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1299119690-13991-2-git-send-email-ming.m.lin@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-04perf_events: Update PEBS event constraintsStephane Eranian
This patch updates PEBS event constraints for Intel Atom, Nehalem, Westmere. This patch also reorganizes the PEBS format/constraint detection code. It is now based on processor model and not PEBS format. Two processors may use the same PEBS format without have the same list of PEBS events. In this second version, we simplified the initialization of the PEBS constraints by leveraging the existing switch() statement in perf_event_intel.c. We also renamed the constraint tables to be more consistent with regular constraints. In this 3rd version, we drop BR_INST_RETIRED.MISPRED from Intel Atom as it does not seem to work. Use MISPREDICTED_BRANCH_RETIRED instead. Also add FP_ASSIST.* o both Intel Nehalem and Westmere. I misssed those in the earlier patches. Events were tested using libpfm4 perf_examples. Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4d6e6b02.815bdf0a.637b.07a7@mx.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-04Merge branch 'perf/urgent' into perf/coreIngo Molnar
Merge reason: Pick up updates before queueing up dependent patches. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-04x86-64, NUMA: Revert NUMA affine page table allocationTejun Heo
This patch reverts NUMA affine page table allocation added by commit 1411e0ec31 (x86-64, numa: Put pgtable to local node memory). The commit made an undocumented change where the kernel linear mapping strictly follows intersection of e820 memory map and NUMA configuration. If the physical memory configuration has holes or NUMA nodes are not properly aligned, this leads to using unnecessarily smaller mapping size which leads to increased TLB pressure. For details, http://thread.gmane.org/gmane.linux.kernel/1104672 Patches to fix the problem have been proposed but the underlying code needs more cleanup and the approach itself seems a bit heavy handed and it has been determined to revert the feature for now and come back to it in the next developement cycle. http://thread.gmane.org/gmane.linux.kernel/1105959 As init_memory_mapping_high() callsites have been consolidated since the commit, reverting is done manually. Also, the RED-PEN comment in arch/x86/mm/init.c is not restored as the problem no longer exists with memblock based top-down early memory allocation. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de>
2011-03-03xen/timer: Missing IRQF_NO_SUSPEND in timer code broke suspend.Ian Campbell
The patches missed an indirect use of IRQF_NO_SUSPEND pulled in via IRQF_TIMER. The following patch fixes the issue. With this fixlet PV guest migration works just fine. I also booted the entire series as a dom0 kernel and it appeared fine. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-03-03xen: handled remapped IRQs when enabling a pcifront PCI device.Ian Campbell
This happens to not be an issue currently because we take pains to try to ensure that the GSI-IRQ mapping is 1-1 in a PV guest and that regular event channels do not clash. However a subsequent patch is going to break this 1-1 mapping. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org>
2011-03-03xen: Mark all initial reserved pages for the balloon as INVALID_P2M_ENTRY.Konrad Rzeszutek Wilk
With this patch, we diligently set regions that will be used by the balloon driver to be INVALID_P2M_ENTRY and under the ownership of the balloon driver. We are OK using the __set_phys_to_machine as we do not expect to be allocating any P2M middle or entries pages. The set_phys_to_machine has the side-effect of potentially allocating new pages and we do not want that at this stage. We can do this because xen_build_mfn_list_list will have already allocated all such pages up to xen_max_p2m_pfn. We also move the check for auto translated physmap down the stack so it is present in __set_phys_to_machine. [v2: Rebased with mmu->p2m code split] Reviewed-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-03-03x86, amd-nb: Misc cleanliness fixesBorislav Petkov
Make functions used strictly in bool context return bool. Also, fixup used types and comments, and make a local function static, while at it. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> Cc: Borislav Petkov <bp@amd64.org> LKML-Reference: <20110303115932.GA8603@aftab> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-03x86: Work around old gas bugJan Beulich
Add extra parentheses around a couple of definitions introduced by "x86: Cleanup vector usage" and used in assembly macro arguments, and remove spaces. Without that old (2.16.1) gas would see more macro arguments than were actually specified. Reported-and-tested-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Shaohua Li <shaohua.li@intel.com> LKML-Reference: <4D6F81B10200007800034B0B@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-02Merge branch 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
* 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6: of/promtree: allow DT device matching by fixing 'name' brokenness (v5) x86: OLPC: have prom_early_alloc BUG rather than return NULL of/flattree: Drop an uninteresting message to pr_debug level of: Add missing of_address.h to xilinx ehci driver
2011-03-02Merge branch 'fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] p4-clockmod: print EST-capable warning message only once [CPUFREQ] fix BUG on cpufreq policy init failure [CPUFREQ] Fix another notifier leak in powernow-k8. [CPUFREQ] Missing "unregister_cpu_notifier" in powernow-k8.c
2011-03-02Merge branch 'idle-release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 * 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6: intel_idle: disable Atom/Lincroft HW C-state auto-demotion intel_idle: disable NHM/WSM HW C-state auto-demotion
2011-03-02x86: OLPC: have prom_early_alloc BUG rather than return NULLAndres Salomon
..similar to what sparc's prom_early_alloc does. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-02x86-64, NUMA: Better explain numa_distance handlingTejun Heo
Handling of out-of-bounds distances and allocation failure can use better documentation. Add it. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Yinghai Lu <yinghai@kernel.org> Acked-by: David Rientjes <rientjes@google.com>
2011-03-02x86-64, NUMA: Fix distance table handlingYinghai Lu
NUMA distance table handling has the following problems. * numa_reset_distance() uses numa_distance * sizeof(numa_distance[0]) as the table size when it should be using the square of numa_distance. * The same size miscalculation when allocation space for phys_dist in numa_emulation(). * In numa_emulation(), phys_dist must be reserved; otherwise, the new emulated distance table may overlap it. Fix them and, while at it, take numa_distance_cnt resetting in numa_reset_distance() out of the if block to simplify the code a bit. David Rientjes reported incorrect handling of distance table during emulation. -tj: Edited out numa_alloc_distance() related changes which weren't necessary and rewrote patch description. -v2: Ingo was unhappy with 80-column limit induced linebreaks. Let lines run over 80-column. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Reported-by: David Rientjes <rientjes@google.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: David Rientjes <rientjes@google.com>
2011-03-02perf, x86: Add Intel SandyBridge CPU supportLin Ming
This patch adds basic SandyBridge support, including hardware cache events and PEBS events support. It has been tested on SandyBridge CPUs with perf stat and also with PEBS based profiling - both work fine. The patch does not affect other models. v2 -> v3: - fix PEBS event 0xd0 with right umask combinations - move snb pebs constraint assignment to intel_pmu_init v1 -> v2: - add more raw and PEBS events constraints - use offcore events for LLC-* cache events - remove the call to Nehalem workaround enable_all function Signed-off-by: Lin Ming <ming.m.lin@intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Andi Kleen <andi@firstfloor.org> LKML-Reference: <1299072424.2175.24.camel@localhost> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-02x86: Fix a bogus unwind annotation in lib/semaphore_32.SJan Beulich
'simple' would have required specifying current frame address and return address location manually, but that's obviously not the case (and not necessary) here. Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <4D6D1082020000780003454C@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-01x86, build: Make sure mkpiggy fails on read errorDaniel J Blueman
Ensure build doesn't silently continue despite read failure, addressing a warning due to the unchecked call. Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com> LKML-Reference: <AANLkTimxxTMU3=4ry-_zbY6v1xiDi+hW9y1RegTr8vLK@mail.gmail.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-03-01[CPUFREQ] p4-clockmod: print EST-capable warning message only onceNaga Chumbalkar
Print the message only once. I see it 16 times on a 2P box with 16 logical CPUs. Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
2011-03-01[CPUFREQ] Fix another notifier leak in powernow-k8.Dave Jones
Do the notifier registration later, so we don't have to worry about freeing it if we fail the msr allocation. Signed-off-by: Dave Jones <davej@redhat.com>
2011-03-01[CPUFREQ] Missing "unregister_cpu_notifier" in powernow-k8.cNeil Brown
It appears that when powernow-k8 finds that No compatible ACPI _PSS objects found. and suggests Try again with latest BIOS. it fails the module load, but does not unregister the cpu_notifier that was registered in powernowk8_init This ends up leaving freed memory on the cpu notifier list for some other poor module (e.g. md/raid5) to come along and trip over. The following might be a partial fix, but I suspect there is probably other clean-up that is needed. ( https://bugzilla.novell.com/show_bug.cgi?id=655215 has full dmesg traces). Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Neil Brown <neilb@suse.de>
2011-02-28x86: Remove unused bits from lib/thunk_*.SJan Beulich
Some of the items removed were apparently never used, others simply didn't get removed with their last user. Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <4D6BD3A002000078000341F1@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-28x86: Use {push,pop}_cfi in more placesJan Beulich
Cleaning up and shortening code... Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Alexander van Heukelum <heukelum@fastmail.fm> LKML-Reference: <4D6BD35002000078000341DA@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-28x86-64: Add CFI annotations to lib/rwsem_64.SJan Beulich
These weren't part of the initial commit of this code. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Alexander van Heukelum <heukelum@fastmail.fm> LKML-Reference: <4D6BCDFF02000078000341B0@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-28x86: Use u32 instead of long to set reset vector back to 0Don Zickus
A customer of ours, complained that when setting the reset vector back to 0, it trashed other data and hung their box. They noticed when only 4 bytes were set to 0 instead of 8, everything worked correctly. Mathew pointed out: | | We're supposed to be resetting trampoline_phys_low and | trampoline_phys_high here, which are two 16-bit values. | Writing 64 bits is definitely going to overwrite space | that we're not supposed to be touching. | So limit the area modified to u32. Signed-off-by: Don Zickus <dzickus@redhat.com> Acked-by: Matthew Garrett <mjg@redhat.com> Cc: <stable@kernel.org> LKML-Reference: <1297139100-424-1-git-send-email-dzickus@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-28percpu, x86: Add arch-specific this_cpu_cmpxchg_double() supportChristoph Lameter
Support this_cpu_cmpxchg_double() using the cmpxchg16b and cmpxchg8b instructions. -tj: s/percpu_cmpxchg16b/percpu_cmpxchg16b_double/ for consistency and other cosmetic changes. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2011-02-25x86, asm: Cleanup unnecssary macros in asm-offsets.cStratos Psomadakis
PAGE_SIZE_asm, PAGE_SHIFT_asm, THREAD_SIZE_asm can be safely removed from asm-offsets.c, and be replaced by their non-'_asm' counterparts in the code that uses them, since the _AC macro defined in include/linux/const.h makes PAGE_SIZE/PAGE_SHIFT/THREAD_SIZE work with as. Signed-off-by: Stratos Psomadakis <psomas@cslab.ece.ntua.gr> LKML-Reference: <1298666774-17646-2-git-send-email-psomas@cslab.ece.ntua.gr> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2011-02-25Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86 quirk: Fix polarity for IRQ0 pin2 override on SB800 systems x86/mrst: Fix apb timer rating when lapic timer is used x86: Fix reboot problem on VersaLogic Menlow boards
2011-02-25xen: suspend: add "arch" to pre/post suspend hooksIan Campbell
xen_pre_device_suspend is unused on ia64. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-25xen: switch to new schedop hypercall by default.Ian Campbell
Rename old interface to sched_op_compat and rename sched_op_new to simply sched_op. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-25xen: use new schedop interface for suspendIan Campbell
Take the opportunity to comment on the semantics of the PV guest suspend hypercall arguments. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-25xen: fix compile issue if XEN is enabled but XEN_PVHVM is disabledStefano Stabellini
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2011-02-25xen: PV on HVM: support PV spinlocks and IPIsStefano Stabellini
Initialize PV spinlocks on boot CPU right after native_smp_prepare_cpus (that switch to APIC mode and initialize APIC routing); on secondary CPUs on CPU_UP_PREPARE. Enable the usage of event channels to send and receive IPIs when running as a PV on HVM guest. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2011-02-25xen: do not use xen_info on HVM, set pv_info name to "Xen HVM"Stefano Stabellini
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
generated by cgit (git 2.34.1) at 2025-09-24 09:55:20 +0000