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authorMel Gorman <mgorman@techsingularity.net>2018-12-28 00:35:48 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-12-28 12:11:48 -0800
commit0a79cdad5eb213b3a629e624565b1b3bf9192b7c (patch)
tree06aee01f5342cc975b477a9dc9e2987840453f59 /mm/internal.h
parenta921444382b49cc7fdeca3fba3e278bc09484a27 (diff)
downloadlinux-0a79cdad5eb213b3a629e624565b1b3bf9192b7c.tar.bz2
mm: use alloc_flags to record if kswapd can wake
This is a preparation patch that copies the GFP flag __GFP_KSWAPD_RECLAIM into alloc_flags. This is a preparation patch only that avoids having to pass gfp_mask through a long callchain in a future patch. Note that the setting in the fast path happens in alloc_flags_nofragment() and it may be claimed that this has nothing to do with ALLOC_NO_FRAGMENT. That's true in this patch but is not true later so it's done now for easier review to show where the flag needs to be recorded. No functional change. [mgorman@techsingularity.net: ALLOC_KSWAPD flag needs to be applied in the !CONFIG_ZONE_DMA32 case] Link: http://lkml.kernel.org/r/20181126143503.GO23260@techsingularity.net Link: http://lkml.kernel.org/r/20181123114528.28802-4-mgorman@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Zi Yan <zi.yan@cs.rutgers.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
-rw-r--r--mm/internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h
index 2ffe0cd64c70..f4a7bb02decf 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -499,6 +499,7 @@ unsigned long reclaim_clean_pages_from_list(struct zone *zone,
#else
#define ALLOC_NOFRAGMENT 0x0
#endif
+#define ALLOC_KSWAPD 0x200 /* allow waking of kswapd */
enum ttu_flags;
struct tlbflush_unmap_batch;