Commit 3d97d976 authored by Vlastimil Babka's avatar Vlastimil Babka
Browse files

mm, slab: ignore SLAB_RECLAIM_ACCOUNT with CONFIG_SLUB_TINY 



SLAB_RECLAIM_ACCOUNT caches allocate their slab pages with
__GFP_RECLAIMABLE and can help against fragmentation by grouping pages
by mobility, but on tiny systems mobility grouping is likely disabled
anyway and ignoring SLAB_RECLAIM_ACCOUNT might instead lead to merging
of caches that are made incompatible just by the flag.

Thus with CONFIG_SLUB_TINY, make SLAB_RECLAIM_ACCOUNT ineffective.

Signed-off-by: default avatarVlastimil Babka <vbabka@suse.cz>
Acked-by: default avatarMike Rapoport <rppt@linux.ibm.com>
Reviewed-by: default avatarChristoph Lameter <cl@linux.com>
parent 2f7c1c13

include/linux/slab.h

+4 −0
Original line number Diff line number Diff line
@@ -129,7 +129,11 @@ 


/* The following flags affect the page allocator grouping pages by mobility */

/* Objects are reclaimable */

#ifndef CONFIG_SLUB_TINY

#define SLAB_RECLAIM_ACCOUNT	((slab_flags_t __force)0x00020000U)

#else

#define SLAB_RECLAIM_ACCOUNT	((slab_flags_t __force)0)

#endif

#define SLAB_TEMPORARY		SLAB_RECLAIM_ACCOUNT	/* Objects are short-lived */



/*