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2016-04-04mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macrosKirill A. Shutemov
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); This patch contains automated changes generated with coccinelle using script below. For some reason, coccinelle doesn't patch header files. I've called spatch for them manually. The only adjustment after coccinelle is revert of changes to PAGE_CAHCE_ALIGN definition: we are going to drop it later. There are few places in the code where coccinelle didn't reach. I'll fix them manually in a separate patch. Comments and documentation also will be addressed with the separate patch. virtual patch @@ expression E; @@ - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ expression E; @@ - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ @@ - PAGE_CACHE_SHIFT + PAGE_SHIFT @@ @@ - PAGE_CACHE_SIZE + PAGE_SIZE @@ @@ - PAGE_CACHE_MASK + PAGE_MASK @@ expression E; @@ - PAGE_CACHE_ALIGN(E) + PAGE_ALIGN(E) @@ expression E; @@ - page_cache_get(E) + get_page(E) @@ expression E; @@ - page_cache_release(E) + put_page(E) Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-23fs/jffs2: use rbtree postorder iteration helper instead of opencodingCody P Schafer
Use rbtree_postorder_for_each_entry_safe() to destroy the rbtree instead of opencoding an alternate postorder iteration that modifies the tree Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: Michel Lespinasse <walken@google.com> Cc: Jan Kara <jack@suse.cz> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-27jffs2: Use pr_fmt and remove jffs: from formatsJoe Perches
Use pr_fmt to prefix KBUILD_MODNAME to appropriate logging messages. Remove now unnecessary internal prefixes from formats. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-03-27jffs2: Convert printks to pr_<level>Joe Perches
Use the more current logging style. Coalesce formats, align arguments. Convert uses of embedded function names to %s, __func__. A couple of long line checkpatch errors I don't care about exist. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25jffs2: Dynamically choose inocache hash sizeDaniel Drake
When JFFS2 is used for large volumes, the mount times are quite long. Increasing the hash size provides a significant speed boost on the OLPC XO-1 laptop. Add logic that dynamically selects a hash size based on the size of the medium. A 64mb medium will result in a hash size of 128, and a 512mb medium will result in a hash size of 1024. Signed-off-by: Daniel Drake <dsd@laptop.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2007-11-01[JFFS2] Improve getdents vs. f_pos handling on NOR flash.David Woodhouse
Commit a491486a2087ac3dfc00efb4f838c8d684afaf54 started obliterating dirents directly on the medium, when jffs2_can_mark_obsolete(). Removing them immediately from the f->dents list, however, screws up handling of f_pos within a directory -- because the offset is equivalent to the number of entries through the list we are, and the existence of deletion dirents served to provide 'placeholders' for unlinked entries. Now, 'rm -r' doesn't even manage to unlink everything in the directory. Revert to keeping 'deletion' dirents in the list, at least in memory even though we no longer write anything to the medium. Spotted, debugged and mostly fixed by Joakim Tjernlund Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-25[JFFS2] Handle inodes with only a single metadata node with non-zero isizeDavid Woodhouse
This should never happen unless there's corruption on the medium and the actual data nodes go missing. But the failure mode (an oops when we assume the fragtree isn't empty and go looking for its last node) isn't useful. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-25[JFFS2] Tidy up licensing/copyright boilerplate.David Woodhouse
In particular, remove the bit in the LICENCE file about contacting Red Hat for alternative arrangements. Their errant IS department broke that arrangement a long time ago -- the policy of collecting copyright assignments from contributors came to an end when the plug was pulled on the servers hosting the project, without notice or reason. We do still dual-license it for use with eCos, with the GPL+exception licence approved by the FSF as being GPL-compatible. It's just that nobody has the right to license it differently. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-04-25[JFFS2] Improve read_inode memory usage, v2.David Woodhouse
We originally used to read every node and allocate a jffs2_tmp_dnode_info structure for each, before processing them in (reverse) version order and discarding the ones which are obsoleted by later nodes. With huge logfiles, this behaviour caused memory problems. For example, a file involved in OLPC trac #1292 has 1822391 nodes, and would cause the XO machine to run out of memory during the first stage of read_inode(). Instead of just inserting nodes into a tree in version order as we find them, we now put them into a tree in order of their offset within the file, which allows us to immediately discard nodes which are completely obsoleted. We don't use a full tree with 'fragments' pointing to the real data structure, as we do in the normal fragtree. We sort only on the start address, and add an 'overlapped' flag to the tmp_dnode_info to indicate that the node in question is (partially) overlapped by another. When the scan is complete, we start at the end of the file, adding each node to a real fragtree as before. Where the node is non-overlapped, we just add it (it doesn't matter that it's not the latest version; there is no overlap). When the node at the end of the tree _is_ overlapped, we sort it and all its overlapping nodes into version order and then add them to the fragtree in that order. This 'early discard' reduces the peak allocation of tmp_dnode_info structures from 1.8M to a mere 62872 (3.5%) in the degenerate case referenced above. This version of the patch also correctly rememembers the highest node version# seen for an inode when it's scanned. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-07-07make fs/jffs2/nodelist.c:jffs2_obsolete_node_frag() staticAdrian Bunk
This patch makes the needlessly global jffs2_obsolete_node_frag() static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-06-27[JFFS2][XATTR] Fix memory leak with jffs2_xattr_refKaiGai Kohei
If xattr_ref is associated with an orphan inode_cache on filesystem mounting, those xattr_refs are not released even if this inode_cache is released. This patch enables to call jffs2_xattr_delete_inode() for such a irregular inode_cachde too. Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-28[JFFS2] Fix oops when marking space dirty in scan, but no previous node exists.David Woodhouse
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-26[JFFS2] Switch to using an array of jffs2_raw_node_refs instead of a list.David Woodhouse
This allows us to drop another pointer from the struct jffs2_raw_node_ref, shrinking it to 8 bytes on 32-bit machines (if the TEST_TOTLEN) paranoia check is turned off, which will be committed soon). Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-24[JFFS2] Introduce ref_next() macro for finding next physical nodeDavid Woodhouse
Another part of the preparation for switching to an array... Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-24[JFFS2] Reduce visibility of raw_node_ref to upper layers of JFFS2 code.David Woodhouse
As the first step towards eliminating the ref->next_phys member and saving memory by using an _array_ of struct jffs2_raw_node_ref per eraseblock, stop the write functions from allocating their own refs; have them just _reserve_ the appropriate number instead. Then jffs2_link_node_ref() can just fill them in. Use a linked list of pre-allocated refs in the superblock, for now. Once we switch to an array, it'll just be a case of extending that array. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-22[JFFS2] Extend jffs2_link_node_ref() to link into per-inode list too.David Woodhouse
Let's avoid the potential for forgetting to set ref->next_in_ino, by doing it within jffs2_link_node_ref() instead. This highlights the ugliness of what we're currently doing with xattr_datum and xattr_ref structures -- we should find a nicer way of dealing with that. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-22[JFFS2] Fix accounting error in jffs2_link_node_ref()David Woodhouse
When filing REF_OBSOLETE nodes, we'd add their size to the global 'dirty_size' count, but then to the eraseblock's 'used_size' count. That's not clever. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Finally eliminate __totlen field from struct jffs2_raw_node_refDavid Woodhouse
Well, almost. We'll actually keep a 'TEST_TOTLEN' macro set for now, and keep doing some paranoia checks to make sure it's all working correctly. But if TEST_TOTLEN is unset, the size of struct jffs2_raw_node_ref drops from 16 bytes to 12 on 32-bit machines. That's a saving of about half a megabyte of memory on the OLPC prototype board, with 125K or so nodes in its 512MiB of flash. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Introduce jffs2_scan_dirty_space() function.David Woodhouse
To eliminate the __totlen field from struct jffs2_raw_node_ref, we need to allocate nodes for dirty space instead of just tweaking the accounting data. Introduce jffs2_scan_dirty_space() in preparation for that. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20[JFFS2] Introduce jffs2_link_node_ref() function to reduce code duplicationDavid Woodhouse
The same sequence of code was repeated in many places, to add a new struct jffs2_raw_node_ref to an eraseblock and adjust the space accounting accordingly. Move it out-of-line. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-19Merge git://git.infradead.org/mtd-2.6KaiGai Kohei
2006-05-15[JFFS2] Fix printk format in some error messages.Andrew Morton
fs/jffs2/nodelist.c: In function `check_node_data': fs/jffs2/nodelist.c:441: warning: unsigned int format, different type arg (arg 4) fs/jffs2/nodelist.c:464: warning: int format, different type arg (arg 5) Modified from Andrew's original fix because while his terminal may indeed only have eighty columns, mine only has _TWENTYFOUR_ lines. So the cosmetic fluff is perfectly OK out past column 80 where it was -- the casual reader doesn't _care_ about anything more than the fact that it goes 'if (foo) JFFS2_WARNING...', and there's no point wasting a whole line to display the tail end of the printk which nobody actually cares about. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-13[JFFS2][XATTR] XATTR support on JFFS2 (version. 5)KaiGai Kohei
This attached patches provide xattr support including POSIX-ACL and SELinux support on JFFS2 (version.5). There are some significant differences from previous version posted at last December. The biggest change is addition of EBS(Erase Block Summary) support. Currently, both kernel and usermode utility (sumtool) can recognize xattr nodes which have JFFS2_NODETYPE_XATTR/_XREF nodetype. In addition, some bugs are fixed. - A potential race condition was fixed. - Unexpected fail when updating a xattr by same name/value pair was fixed. - A bug when removing xattr name/value pair was fixed. The fundamental structures (such as using two new nodetypes and exclusion mechanism by rwsem) are unchanged. But most of implementation were reviewed and updated if necessary. Espacially, we had to change several internal implementations related to load_xattr_datum() to avoid a potential race condition. [1/2] xattr_on_jffs2.kernel.version-5.patch [2/2] xattr_on_jffs2.utils.version-5.patch Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-03-09[PATCH] mtd: 64 bit fixesAtsushi Nemoto
Fix some bugs in mtd/jffs2 on 64bit platform. The MEMGETBADBLOCK/MEMSETBADBLOCK ioctl are not listed in compat_ioctl.h. And some variables in jffs2 are declared as uint32_t but used to hold size_t values. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Thomas Gleixner <tglx@linutronix.de> Acked-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-14[PATCH] Unlinline a bunch of other functionsArjan van de Ven
Remove the "inline" keyword from a bunch of big functions in the kernel with the goal of shrinking it by 30kb to 40kb Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07[JFFS2] Clean up trailing white spacesThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code simplification, update TODOArtem B. Bityutskiy
Simplify the debugging code further. Update the TODO list Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Solve BUG caused by frag->node representing a hole in fragtreeArtem B. Bityutskiy
Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Calculate CRC check starting point correctlyArtem B. Bityutskiy
When data starts from the beginning of NAND page, 'len' must be zero, not c->wbuf_page. Thanks to Zoltan Sogor for reporting this problem. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] More message formatting cleanupsArtem B. Bityutskiy
Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code clean up - step 7Artem B. Bityutskiy
Remove more noisy debugs. Add current->pid to debug messages. Remove bogus includes. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Correct buggy length checksArtem B. Bityutskiy
The previous changes introduced wrong length calculations. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code clean up - step 6Artem B. Bityutskiy
Remove extra noisy debugs Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Build fragtree in reverse orderArtem B. Bityutskiy
Instead of building fragtree starting from node with the smallest version number, start from the highest. This helps to avoid reading and checking obsolete nodes. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Move another fragtree-related function to nodelist.cArtem B. Bityutskiy
Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code clean up - step 5Artem B. Bityutskiy
Replace the D1(printk()) style debugging with the new debug macros Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Move scattered function into related filesArtem B. Bityutskiy
Move functions to read inodes into readinode.c Move functions to handle fragtree and dentry lists into nodelist.[ch] Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Debug code clean up - step 3Artem B. Bityutskiy
Various simplifiactions. printk format corrections. Convert more code to use the new debug functions. Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-11-06[JFFS2] Split a large routine on several smaller.Artem B. Bityutskiy
Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-07-12[JFFS2] Rename function and update commentsArtem B. Bityuckiy
We recently changed the method of collecting and sorting of tmp_dnode objects to use a temporary RB-tree instead of a temporary list. Rename function and update comments. Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-07-06[JFFS2] Simplify the tree insert code.Artem B. Bityuckiy
It isn't _normal_ that we allow key collision in rbtrees, but it does not matter as long as the two nodes with the same version are together. Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-07-06[JFFS2] Optimise jffs2_add_tn_to_list David Woodhouse
Use an rbtree instead of a simple linked list. We were wasting an amazing amount of time in jffs2_add_tn_to_list(). Thanks to Artem Bityuckiy and Jarkko Jlavinen for noticing. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23[JFFS2] Whitespace cleanup. Fix missing debug messageThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23[JFFS2] Fix inode allocation raceDavid Woodhouse
Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23[JFFS2] Prevent ino cache removal for inodes in useDavid Woodhouse
Don't remove inocache for inodes which are in read_inode() or clear_inode() until they're done. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-05-23[JFFS2] Avoid warning for empty filesystemsTodd Poynor
Avoid "Eep. No valid nodes for ino #1" message for just-created filesystem. Signed-off-by: Todd Poynor <tpoynor@mvista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!