linux_dsm_epyc7002/arch/unicore32
David Rientjes 4b59e6c473 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>
2013-04-29 15:54:28 -07:00
..
boot Kbuild: centralize MKIMAGE and cmd_uimage definitions 2012-03-26 15:49:20 +02:00
configs unicore32: add KBUILD_DEFCONFIG with unicore32_defconfig (old debug_defconfig) 2011-06-09 16:24:42 +08:00
include Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-12-20 18:05:28 -08:00
kernel The sweeping change is to make add_taint() explicitly indicate whether to disable 2013-02-25 15:41:43 -08:00
lib unicore32: fix build error for find bitops 2011-11-15 17:13:14 +08:00
mm mm, show_mem: suppress page counts in non-blockable contexts 2013-04-29 15:54:28 -07:00
.gitignore unicore32 core architecture: build infrastructure 2011-03-17 09:19:05 +08:00
Kconfig Select VIRT_TO_BUS directly where needed 2013-03-12 11:16:40 -07:00
Kconfig.debug unicore32: drop unused Kconfig symbols 2011-11-15 17:13:18 +08:00
Makefile unicore32: Use generic init_task 2012-05-05 13:00:26 +02:00