From: Hugh Dickins <hughd@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andres Lagar-Cavilla <andreslc@google.com>,
Yang Shi <yang.shi@linaro.org>, Ning Qu <quning@gmail.com>,
David Rientjes <rientjes@google.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH 31/31] huge tmpfs: no kswapd by default on sync allocations
Date: Tue, 5 Apr 2016 15:07:29 -0700 (PDT) [thread overview]
Message-ID: <alpine.LSU.2.11.1604051505580.5965@eggly.anvils> (raw)
In-Reply-To: <alpine.LSU.2.11.1604051403210.5965@eggly.anvils>
From: Andres Lagar-Cavilla <andreslc@google.com>
This triggers early compaction abort while in process context, to
ameliorate mmap semaphore stalls.
Suggested-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andres Lagar-Cavilla <andreslc@google.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
---
Documentation/filesystems/tmpfs.txt | 5 +++--
mm/shmem.c | 3 ++-
2 files changed, 5 insertions(+), 3 deletions(-)
--- a/Documentation/filesystems/tmpfs.txt
+++ b/Documentation/filesystems/tmpfs.txt
@@ -194,8 +194,9 @@ to force huge off for all (intended for
/proc/sys/vm/shmem_huge_gfpmask (intended for experimentation only):
-Default 38146762, that is 0x24612ca:
-GFP_HIGHUSER_MOVABLE|__GFP_NOWARN|__GFP_THISNODE|__GFP_NORETRY.
+Default 4592330, that is 0x4612ca:
+GFP_HIGHUSER_MOVABLE|__GFP_NOWARN|__GFP_THISNODE|__GFP_NORETRY
+minus __GFP_KSWAPD_RECLAIM.
Write a gfpmask built from __GFP flags in include/linux/gfp.h, to experiment
with better alternatives for the synchronous huge tmpfs allocation used
when faulting or writing.
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -324,7 +324,8 @@ int shmem_huge __read_mostly;
int shmem_huge_recoveries __read_mostly = 8; /* concurrent recovery limit */
int shmem_huge_gfpmask __read_mostly =
- (int)(GFP_HIGHUSER_MOVABLE|__GFP_NOWARN|__GFP_THISNODE|__GFP_NORETRY);
+ (int)(GFP_HIGHUSER_MOVABLE|__GFP_NOWARN|__GFP_THISNODE|__GFP_NORETRY) &
+ ~__GFP_KSWAPD_RECLAIM;
int shmem_recovery_gfpmask __read_mostly =
(int)(GFP_HIGHUSER_MOVABLE|__GFP_NOWARN|__GFP_THISNODE);
prev parent reply other threads:[~2016-04-05 22:07 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-05 21:10 [PATCH 00/31] huge tmpfs: THPagecache implemented by teams Hugh Dickins
2016-04-05 21:12 ` [PATCH 01/31] huge tmpfs: prepare counts in meminfo, vmstat and SysRq-m Hugh Dickins
2016-04-11 11:05 ` Kirill A. Shutemov
2016-04-17 2:28 ` Hugh Dickins
2016-04-05 21:13 ` [PATCH 02/31] huge tmpfs: include shmem freeholes in available memory Hugh Dickins
2016-04-05 21:15 ` [PATCH 03/31] huge tmpfs: huge=N mount option and /proc/sys/vm/shmem_huge Hugh Dickins
2016-04-11 11:17 ` Kirill A. Shutemov
2016-04-17 2:00 ` Hugh Dickins
2016-04-05 21:16 ` [PATCH 04/31] huge tmpfs: try to allocate huge pages, split into a team Hugh Dickins
2016-04-05 21:17 ` [PATCH 05/31] huge tmpfs: avoid team pages in a few places Hugh Dickins
2016-04-05 21:20 ` [PATCH 06/31] huge tmpfs: shrinker to migrate and free underused holes Hugh Dickins
2016-04-05 21:21 ` [PATCH 07/31] huge tmpfs: get_unmapped_area align & fault supply huge page Hugh Dickins
2016-04-05 21:23 ` [PATCH 08/31] huge tmpfs: try_to_unmap_one use page_check_address_transhuge Hugh Dickins
2016-04-05 21:24 ` [PATCH 09/31] huge tmpfs: avoid premature exposure of new pagetable Hugh Dickins
2016-04-11 11:54 ` Kirill A. Shutemov
2016-04-17 1:49 ` Hugh Dickins
2016-04-05 21:25 ` [PATCH 10/31] huge tmpfs: map shmem by huge page pmd or by page team ptes Hugh Dickins
2016-04-05 21:29 ` [PATCH 11/31] huge tmpfs: disband split huge pmds on race or memory failure Hugh Dickins
2016-04-05 21:33 ` [PATCH 12/31] huge tmpfs: extend get_user_pages_fast to shmem pmd Hugh Dickins
2016-04-06 7:00 ` Ingo Molnar
2016-04-07 2:53 ` Hugh Dickins
2016-04-13 8:58 ` Ingo Molnar
2016-04-05 21:34 ` [PATCH 13/31] huge tmpfs: use Unevictable lru with variable hpage_nr_pages Hugh Dickins
2016-04-05 21:35 ` [PATCH 14/31] huge tmpfs: fix Mlocked meminfo, track huge & unhuge mlocks Hugh Dickins
2016-04-05 21:37 ` [PATCH 15/31] huge tmpfs: fix Mapped meminfo, track huge & unhuge mappings Hugh Dickins
2016-04-05 21:39 ` [PATCH 16/31] kvm: plumb return of hva when resolving page fault Hugh Dickins
2016-04-05 21:41 ` [PATCH 17/31] kvm: teach kvm to map page teams as huge pages Hugh Dickins
2016-04-05 23:37 ` Paolo Bonzini
2016-04-06 1:12 ` Hugh Dickins
2016-04-06 6:47 ` Paolo Bonzini
2016-04-05 21:44 ` [PATCH 18/31] huge tmpfs: mem_cgroup move charge on shmem " Hugh Dickins
2016-04-05 21:46 ` [PATCH 19/31] huge tmpfs: mem_cgroup shmem_pmdmapped accounting Hugh Dickins
2016-04-05 21:47 ` [PATCH 20/31] huge tmpfs: mem_cgroup shmem_hugepages accounting Hugh Dickins
2016-04-05 21:49 ` [PATCH 21/31] huge tmpfs: show page team flag in pageflags Hugh Dickins
2016-04-05 21:51 ` [PATCH 22/31] huge tmpfs: /proc/<pid>/smaps show ShmemHugePages Hugh Dickins
2016-04-05 21:53 ` [PATCH 23/31] huge tmpfs recovery: framework for reconstituting huge pages Hugh Dickins
2016-04-06 10:28 ` Mika Penttilä
2016-04-07 2:05 ` Hugh Dickins
2016-04-05 21:54 ` [PATCH 24/31] huge tmpfs recovery: shmem_recovery_populate to fill huge page Hugh Dickins
2016-04-05 21:56 ` [PATCH 25/31] huge tmpfs recovery: shmem_recovery_remap & remap_team_by_pmd Hugh Dickins
2016-04-05 21:58 ` [PATCH 26/31] huge tmpfs recovery: shmem_recovery_swapin to read from swap Hugh Dickins
2016-04-05 22:00 ` [PATCH 27/31] huge tmpfs recovery: tweak shmem_getpage_gfp to fill team Hugh Dickins
2016-04-05 22:02 ` [PATCH 28/31] huge tmpfs recovery: debugfs stats to complete this phase Hugh Dickins
2016-04-05 22:03 ` [PATCH 29/31] huge tmpfs recovery: page migration call back into shmem Hugh Dickins
2016-04-05 22:05 ` [PATCH 30/31] huge tmpfs: shmem_huge_gfpmask and shmem_recovery_gfpmask Hugh Dickins
2016-04-05 22:07 ` Hugh Dickins [this message]
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