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authorKirill Korotaev <dev@sw.ru>2005-11-13 19:06:41 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-13 21:14:12 -0500
commit885036d32f5d3c427c3e2b385b5a5503805e3e52 (patch)
tree7f442b309a749d8cbe0f2ac5c38531eeff8bfcd8 /mm/page_alloc.c
parentd4d28dd4b12649d02a89d19e6bd12ab92a6fcd4e (diff)
[PATCH] mm: __GFP_NOFAIL fix
In __alloc_pages(): if ((p->flags & (PF_MEMALLOC | PF_MEMDIE)) && !in_interrupt()) { /* go through the zonelist yet again, ignoring mins */ for (i = 0; zones[i] != NULL; i++) { struct zone *z = zones[i]; page = buffered_rmqueue(z, order, gfp_mask); if (page) { zone_statistics(zonelist, z); goto got_pg; } } goto nopage; <<<< HERE!!! FAIL... } kswapd (which has PF_MEMALLOC flag) can fail to allocate memory even when it allocates it with __GFP_NOFAIL flag. Signed-Off-By: Pavel Emelianov <xemul@sw.ru> Signed-Off-By: Denis Lunev <den@sw.ru> Signed-Off-By: Kirill Korotaev <dev@sw.ru> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 987225bdd661..b37dc0f78d07 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -895,6 +895,7 @@ zone_reclaim_retry:
895 if (((p->flags & PF_MEMALLOC) || unlikely(test_thread_flag(TIF_MEMDIE))) 895 if (((p->flags & PF_MEMALLOC) || unlikely(test_thread_flag(TIF_MEMDIE)))
896 && !in_interrupt()) { 896 && !in_interrupt()) {
897 if (!(gfp_mask & __GFP_NOMEMALLOC)) { 897 if (!(gfp_mask & __GFP_NOMEMALLOC)) {
898nofail_alloc:
898 /* go through the zonelist yet again, ignoring mins */ 899 /* go through the zonelist yet again, ignoring mins */
899 for (i = 0; (z = zones[i]) != NULL; i++) { 900 for (i = 0; (z = zones[i]) != NULL; i++) {
900 if (!cpuset_zone_allowed(z, gfp_mask)) 901 if (!cpuset_zone_allowed(z, gfp_mask))
@@ -903,6 +904,10 @@ zone_reclaim_retry:
903 if (page) 904 if (page)
904 goto got_pg; 905 goto got_pg;
905 } 906 }
907 if (gfp_mask & __GFP_NOFAIL) {
908 blk_congestion_wait(WRITE, HZ/50);
909 goto nofail_alloc;
910 }
906 } 911 }
907 goto nopage; 912 goto nopage;
908 } 913 }