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authorVlastimil Babka <vbabka@suse.cz>2022-11-11 11:04:55 +0100
committerVlastimil Babka <vbabka@suse.cz>2022-12-01 00:09:20 +0100
commit149b6fa228eda1d191abc440af7162264d716d90 (patch)
treef37c26668fbcdeb9eb44f90242578175e175a2b4 /arch/openrisc
parentbe784ba861b93c5cd2c0565c5819c290675b50be (diff)
mm, slob: rename CONFIG_SLOB to CONFIG_SLOB_DEPRECATED
As explained in [1], we would like to remove SLOB if possible. - There are no known users that need its somewhat lower memory footprint so much that they cannot handle SLUB (after some modifications by the previous patches) instead. - It is an extra maintenance burden, and a number of features are incompatible with it. - It blocks the API improvement of allowing kfree() on objects allocated via kmem_cache_alloc(). As the first step, rename the CONFIG_SLOB option in the slab allocator configuration choice to CONFIG_SLOB_DEPRECATED. Add CONFIG_SLOB depending on CONFIG_SLOB_DEPRECATED as an internal option to avoid code churn. This will cause existing .config files and defconfigs with CONFIG_SLOB=y to silently switch to the default (and recommended replacement) SLUB, while still allowing SLOB to be configured by anyone that notices and needs it. But those should contact the slab maintainers and linux-mm@kvack.org as explained in the updated help. With no valid objections, the plan is to update the existing defconfigs to SLUB and remove SLOB in a few cycles. To make SLUB more suitable replacement for SLOB, a CONFIG_SLUB_TINY option was introduced to limit SLUB's memory overhead. There is a number of defconfigs specifying CONFIG_SLOB=y. As part of this patch, update them to select CONFIG_SLUB and CONFIG_SLUB_TINY. [1] https://lore.kernel.org/all/b35c3f82-f67b-2103-7d82-7a7ba7521439@suse.cz/ Cc: Russell King <linux@armlinux.org.uk> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Janusz Krzysztofik <jmkrzyszt@gmail.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Stafford Horne <shorne@gmail.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Conor Dooley <conor@kernel.org> Cc: Damien Le Moal <damien.lemoal@opensource.wdc.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi> # OMAP1 Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> # riscv k210 Acked-by: Arnd Bergmann <arnd@arndb.de> # arm Acked-by: Roman Gushchin <roman.gushchin@linux.dev> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Reviewed-by: Christoph Lameter <cl@linux.com>
Diffstat (limited to 'arch/openrisc')
-rw-r--r--arch/openrisc/configs/or1ksim_defconfig3
-rw-r--r--arch/openrisc/configs/simple_smp_defconfig3
2 files changed, 4 insertions, 2 deletions
diff --git a/arch/openrisc/configs/or1ksim_defconfig b/arch/openrisc/configs/or1ksim_defconfig
index 6e1e004047c7..0116e465238f 100644
--- a/arch/openrisc/configs/or1ksim_defconfig
+++ b/arch/openrisc/configs/or1ksim_defconfig
@@ -10,7 +10,8 @@ CONFIG_EXPERT=y
# CONFIG_AIO is not set
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_COMPAT_BRK is not set
-CONFIG_SLOB=y
+CONFIG_SLUB=y
+CONFIG_SLUB_TINY=y
CONFIG_MODULES=y
# CONFIG_BLOCK is not set
CONFIG_OPENRISC_BUILTIN_DTB="or1ksim"
diff --git a/arch/openrisc/configs/simple_smp_defconfig b/arch/openrisc/configs/simple_smp_defconfig
index ff49d868e040..b990cb6c9309 100644
--- a/arch/openrisc/configs/simple_smp_defconfig
+++ b/arch/openrisc/configs/simple_smp_defconfig
@@ -16,7 +16,8 @@ CONFIG_EXPERT=y
# CONFIG_AIO is not set
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_COMPAT_BRK is not set
-CONFIG_SLOB=y
+CONFIG_SLUB=y
+CONFIG_SLUB_TINY=y
CONFIG_MODULES=y
# CONFIG_BLOCK is not set
CONFIG_OPENRISC_BUILTIN_DTB="simple_smp"