Aaron Lu 4fb12a087a mm/swap: use nr_node_ids for avail_lists in swap_info_struct ... [ Upstream commit 66f71da9dd ] Since a2468cc9bf ("swap: choose swap device according to numa node"), avail_lists field of swap_info_struct is changed to an array with MAX_NUMNODES elements. This made swap_info_struct size increased to 40KiB and needs an order-4 page to hold it. This is not optimal in that: 1 Most systems have way less than MAX_NUMNODES(1024) nodes so it is a waste of memory; 2 It could cause swapon failure if the swap device is swapped on after system has been running for a while, due to no order-4 page is available as pointed out by Vasily Averin. Solve the above two issues by using nr_node_ids(which is the actual possible node number the running system has) for avail_lists instead of MAX_NUMNODES. nr_node_ids is unknown at compile time so can't be directly used when declaring this array. What I did here is to declare avail_lists as zero element array and allocate space for it when allocating space for swap_info_struct. The reason why keep using array but not pointer is plist_for_each_entry needs the field to be part of the struct, so pointer will not work. This patch is on top of Vasily Averin's fix commit. I think the use of kvzalloc for swap_info_struct is still needed in case nr_node_ids is really big on some systems. Link: http://lkml.kernel.org/r/20181115083847.GA11129@intel.com Signed-off-by: Aaron Lu <aaron.lu@intel.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Vasily Averin <vvs@virtuozzo.com> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-01-26 09:37:06 +01:00
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acpi
asm-generic	locking/qspinlock: Fix build for anonymous union in older GCC compilers	2018-12-21 14:13:11 +01:00
clocksource
crypto	crypto: vmac - separate tfm and request context	2018-08-17 21:01:10 +02:00
drm	drm/edid: VSDB yCBCr420 Deep Color mode bit definitions	2018-11-10 07:48:35 -08:00
dt-bindings	dt-bindings: clock: mediatek: add binding for fixed-factor clock axisel_d4	2018-04-24 09:36:34 +02:00
keys
kvm	arm/arm64: KVM: Add PSCI version selection API	2018-05-01 12:58:27 -07:00
linux	mm/swap: use nr_node_ids for avail_lists in swap_info_struct	2019-01-26 09:37:06 +01:00
math-emu
media	media: v4l: event: Prevent freeing event subscriptions while accessed	2018-10-03 17:01:00 -07:00
memory
misc
net	netfilter: nf_conncount: Fix garbage collection with zones	2019-01-09 17:14:51 +01:00
pcmcia
ras
rdma	IB/hfi1: Optimize kthread pointer locking when queuing CQ entries	2018-07-03 11:24:54 +02:00
scsi	scsi: core: introduce force_blk_mq	2018-08-15 18:12:47 +02:00
soc	memory: tegra: Apply interrupts mask per SoC	2018-08-03 07:50:38 +02:00
sound	ALSA: pcm: Fix interval evaluation with openmin/max	2018-12-13 09:18:51 +01:00
target
trace	ext4: force inode writes when nfsd calls commit_metadata()	2019-01-09 17:14:49 +01:00
uapi	Input: restore EV_ABS ABS_RESERVED	2019-01-13 10:00:56 +01:00
video	udlfb: set optimal write delay	2018-09-09 19:56:01 +02:00
xen	Revert "xen/balloon: Mark unallocated host memory as UNUSABLE"	2018-12-17 09:28:53 +01:00