linux/arch/ia64
Johannes Weiner e97ca8e5b8 mm: fix GFP_THISNODE callers and clarify
GFP_THISNODE is for callers that implement their own clever fallback to
remote nodes.  It restricts the allocation to the specified node and
does not invoke reclaim, assuming that the caller will take care of it
when the fallback fails, e.g.  through a subsequent allocation request
without GFP_THISNODE set.

However, many current GFP_THISNODE users only want the node exclusive
aspect of the flag, without actually implementing their own fallback or
triggering reclaim if necessary.  This results in things like page
migration failing prematurely even when there is easily reclaimable
memory available, unless kswapd happens to be running already or a
concurrent allocation attempt triggers the necessary reclaim.

Convert all callsites that don't implement their own fallback strategy
to __GFP_THISNODE.  This restricts the allocation a single node too, but
at the same time allows the allocator to enter the slowpath, wake
kswapd, and invoke direct reclaim if necessary, to make the allocation
happen when memory is full.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Jan Stancek <jstancek@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-03-10 17:26:19 -07:00
..
configs ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
dig Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
hp ACPI and power management updates for 3.14-rc1 2014-01-24 15:51:02 -08:00
include [IA64] Wire up new sched_setattr and sched_getattr syscalls 2014-01-28 09:52:53 -08:00
kernel mm: fix GFP_THISNODE callers and clarify 2014-03-10 17:26:19 -07:00
kvm KVM: Use cond_resched() directly and remove useless kvm_resched() 2013-12-13 14:23:45 +01:00
lib Fix common misspellings 2011-03-31 11:26:23 -03:00
mm mm, show_mem: remove SHOW_MEM_FILTER_PAGE_COUNT 2014-01-21 16:19:44 -08:00
oprofile Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
pci ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node 2013-11-14 23:14:43 +01:00
scripts
sn ia64/PCI: Use dev_is_pci() to identify PCI devices 2013-12-09 16:50:22 -07:00
uv ia64: change to new flag variables 2011-03-17 14:02:56 +01:00
install.sh
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-01-24 17:17:30 -08:00
Kconfig.debug
Makefile ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
module.lds