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Commit b066272d authored Mar 14, 2017 by Patrick Daly Committed by Swathi Sridhar Feb 23, 2019

mm: vmscan: support equal reclaim for anon and file pages



When performing memory reclaim support treating anonymous and
file backed pages equally.

Swapping anonymous pages out to memory can be efficient enough
to justify treating anonymous and file backed pages equally.

CRs-Fixed: 648984
Change-Id: I6315b8557020d1e27a34225bb9cefbef1fb43266
Signed-off-by: Liam Mark <lmark@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
Signed-off-by: Sudarshan Rajagopalan <sudaraja@codeaurora.org>
[swatsrid@codeaurora.org: Fix trivial merge conflicts]
Signed-off-by: Swathi Sridhar <swatsrid@codeaurora.org>

parent 37b60809

mm/Kconfig

+9 −0

Original line number	Diff line number	Diff line
		@@ -651,6 +651,15 @@ config MAX_STACK_SIZE_MB

		A sane initial value is 80 MB.

		config BALANCE_ANON_FILE_RECLAIM
		bool "During reclaim treat anon and file backed pages equally"
		depends on SWAP
		help
		When performing memory reclaim treat anonymous and file backed pages
		equally.
		Swapping anonymous pages out to memory can be efficient enough to justify
		treating anonymous and file backed pages equally.

		config DEFERRED_STRUCT_PAGE_INIT
		bool "Defer initialisation of struct pages to kthreads"
		default n

mm/vmscan.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -2377,7 +2377,8 @@ static void get_scan_count(struct lruvec lruvec, struct mem_cgroup memcg,
		* lruvec even if it has plenty of old anonymous pages unless the
		* system is under heavy pressure.
		*/
		if (!inactive_list_is_low(lruvec, true, memcg, sc, false) &&
		if (!IS_ENABLED(CONFIG_BALANCE_ANON_FILE_RECLAIM) &&
		!inactive_list_is_low(lruvec, true, memcg, sc, false) &&
		lruvec_lru_size(lruvec, LRU_INACTIVE_FILE, sc->reclaim_idx) >> sc->priority) {
		scan_balance = SCAN_FILE;
		goto out;