The patch titled
Subject: mm: don't set __GFP_WRITE on ramfs/sysfs writes
has been added to the -mm tree. Its filename is
mm-dont-set-__gfp_write-on-ramfs-sysfs-writes.patch
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From: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Subject: mm: don't set __GFP_WRITE on ramfs/sysfs writes
There is not much point in skipping zones during allocation based on the
dirty usage which they'll never contribute to. And we'd like to avoid
page reclaim waits when writing to ramfs/sysfs etc.
Signed-off-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Greg Thelen <gthelen@xxxxxxxxxx>
Cc: Ying Han <yinghan@xxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/filemap.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN mm/filemap.c~mm-dont-set-__gfp_write-on-ramfs-sysfs-writes mm/filemap.c
--- a/mm/filemap.c~mm-dont-set-__gfp_write-on-ramfs-sysfs-writes
+++ a/mm/filemap.c
@@ -2341,7 +2341,9 @@ struct page *grab_cache_page_write_begin
struct page *page;
gfp_t gfp_notmask = 0;
- gfp_mask = mapping_gfp_mask(mapping) | __GFP_WRITE;
+ gfp_mask = mapping_gfp_mask(mapping);
+ if (mapping_cap_account_dirty(mapping))
+ gfp_mask |= __GFP_WRITE;
if (flags & AOP_FLAG_NOFS)
gfp_notmask = __GFP_FS;
repeat:
_
Subject: Subject: mm: don't set __GFP_WRITE on ramfs/sysfs writes
Patches currently in -mm which might be from fengguang.wu@xxxxxxxxx are
linux-next.patch
pagemap-avoid-splitting-thp-when-reading-proc-pid-pagemap.patch
thp-optimize-away-unnecessary-page-table-locking.patch
thp-optimize-away-unnecessary-page-table-locking-fix.patch
pagemap-export-kpf_thp.patch
pagemap-document-kpf_thp-and-make-page-types-aware-of-it.patch
pagemap-introduce-data-structure-for-pagemap-entry.patch
mm-dont-set-__gfp_write-on-ramfs-sysfs-writes.patch
move-page-typesc-from-documentation-to-tools-vm.patch
move-slabinfoc-to-tools-vm.patch
move-hugepage-test-examples-to-tools-testing-selftests-vm.patch
move-hugepage-test-examples-to-tools-testing-selftests-vm-fix.patch
move-hugepage-test-examples-to-tools-testing-selftests-vm-fix-fix.patch
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