Mel Gorman 6aa303defb mm, vmscan: only allocate and reclaim from zones with pages managed by the buddy allocator ... Firmware Assisted Dump (FA_DUMP) on ppc64 reserves substantial amounts of memory when booting a secondary kernel. Srikar Dronamraju reported that multiple nodes may have no memory managed by the buddy allocator but still return true for populated_zone(). Commit 1d82de618d ("mm, vmscan: make kswapd reclaim in terms of nodes") was reported to cause kswapd to spin at 100% CPU usage when fadump was enabled. The old code happened to deal with the situation of a populated node with zero free pages by co-incidence but the current code tries to reclaim populated zones without realising that is impossible. We cannot just convert populated_zone() as many existing users really need to check for present_pages. This patch introduces a managed_zone() helper and uses it in the few cases where it is critical that the check is made for managed pages -- zonelist construction and page reclaim. Link: http://lkml.kernel.org/r/20160831195104.GB8119@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Reported-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Tested-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-09-01 17:52:01 -07:00
..
acpi	treewide: replace obsolete _refok by __ref	2016-08-02 17:31:41 -04:00
asm-generic	mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS	2016-08-30 10:10:21 -07:00
clocksource
crypto	A number of improvements for the /dev/random driver; the most	2016-07-27 15:11:55 -07:00
drm	Merge branch 'drm-next-4.8' of git://people.freedesktop.org/~agd5f/linux into drm-next	2016-08-08 16:45:33 +10:00
dt-bindings	ARM: DT updates for v4.8	2016-08-01 18:37:45 -04:00
keys
kvm	KVM/ARM Changes for v4.8 - Take 2	2016-08-04 13:59:56 +02:00
linux	mm, vmscan: only allocate and reclaim from zones with pages managed by the buddy allocator	2016-09-01 17:52:01 -07:00
math-emu
media	dma-mapping: use unsigned long for dma_attrs	2016-08-04 08:50:07 -04:00
memory
misc
net	tcp: fix use after free in tcp_xmit_retransmit_queue()	2016-08-18 23:22:57 -07:00
pcmcia
ras
rdma	IB/core: Use memdup_user() rather than duplicating its implementation	2016-08-23 12:40:13 -04:00
rxrpc
scsi	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2016-08-04 20:04:37 -04:00
soc	ARM: SoC driver updates for v4.8	2016-08-01 18:36:01 -04:00
sound	Merge tag 'drm-for-v4.8' of git://people.freedesktop.org/~airlied/linux	2016-08-01 21:44:08 -04:00
target
trace	Luiz Capitulino noticed that the tick_stop tracepoint wasn't being parsed	2016-08-09 10:34:09 -07:00
uapi	include/uapi/linux/ipx.h: fix conflicting defitions with glibc netipx/ipx.h	2016-08-22 16:25:15 -07:00
video
xen	xen: change the type of xen_vcpu_id to uint32_t	2016-08-24 18:17:27 +01:00
Kbuild