From eb07c4f39c3e858a7d0cc4bb15b8a304f83f0497 Mon Sep 17 00:00:00 2001 From: Vlastimil Babka Date: Tue, 23 May 2023 09:06:34 +0200 Subject: mm/slab: rename CONFIG_SLAB to CONFIG_SLAB_DEPRECATED As discussed at LSF/MM [1] [2] and with no objections raised there, deprecate the SLAB allocator. Rename the user-visible option so that users with CONFIG_SLAB=y get a new prompt with explanation during make oldconfig, while make olddefconfig will just switch to SLUB. In all defconfigs with CONFIG_SLAB=y remove the line so those also switch to SLUB. Regressions due to the switch should be reported to linux-mm and slab maintainers. [1] https://lore.kernel.org/all/4b9fc9c6-b48c-198f-5f80-811a44737e5f@suse.cz/ [2] https://lwn.net/Articles/932201/ Signed-off-by: Vlastimil Babka Acked-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Acked-by: David Rientjes Acked-by: Geert Uytterhoeven # m68k Acked-by: Helge Deller # parisc --- mm/Kconfig | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'mm/Kconfig') diff --git a/mm/Kconfig b/mm/Kconfig index 7672a22647b4..b537c4436d18 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -218,11 +218,18 @@ choice help This option allows to select a slab allocator. -config SLAB - bool "SLAB" +config SLAB_DEPRECATED + bool "SLAB (DEPRECATED)" depends on !PREEMPT_RT select HAVE_HARDENED_USERCOPY_ALLOCATOR help + Deprecated and scheduled for removal in a few cycles. Replaced by + SLUB. + + If you cannot migrate to SLUB, please contact linux-mm@kvack.org + and the people listed in the SLAB ALLOCATOR section of MAINTAINERS + file, explaining why. + The regular slab allocator that is established and known to work well in all environments. It organizes cache hot objects in per cpu and per node queues. @@ -240,6 +247,11 @@ config SLUB endchoice +config SLAB + bool + default y + depends on SLAB_DEPRECATED + config SLUB_TINY bool "Configure SLUB for minimal memory footprint" depends on SLUB && EXPERT -- cgit