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authorDavid Rientjes <rientjes@google.com>2013-04-30 00:06:11 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-30 00:54:28 +0200
commit4b59e6c4730978679b414a8da61514a2518da512 (patch)
tree241f48acea764191a458c6ae2d058b079b24f12d /lib/crc-itu-t.c
parentmm: trace filemap add and del (diff)
downloadlinux-4b59e6c4730978679b414a8da61514a2518da512.tar.xz
linux-4b59e6c4730978679b414a8da61514a2518da512.zip
mm, show_mem: suppress page counts in non-blockable contexts
On large systems with a lot of memory, walking all RAM to determine page types may take a half second or even more. In non-blockable contexts, the page allocator will emit a page allocation failure warning unless __GFP_NOWARN is specified. In such contexts, irqs are typically disabled and such a lengthy delay may even result in NMI watchdog timeouts. To fix this, suppress the page walk in such contexts when printing the page allocation failure warning. Signed-off-by: David Rientjes <rientjes@google.com> Cc: Mel Gorman <mgorman@suse.de> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/crc-itu-t.c')
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