The patch titled
Subject: nfs: no PG_private waiters remain, remove waker
has been added to the -mm tree. Its filename is
nfs-no-pg_private-waiters-remain-remove-waker.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/nfs-no-pg_private-waiters-remain-remove-waker.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/nfs-no-pg_private-waiters-remain-remove-waker.patch
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------------------------------------------------------
From: Nicholas Piggin <npiggin@xxxxxxxxx>
Subject: nfs: no PG_private waiters remain, remove waker
Since commit 4f52b6bb ("NFS: Don't call COMMIT in ->releasepage()"), no
tasks wait on PagePrivate, so the wake introduced in commit 95905446
("NFS: avoid deadlocks with loop-back mounted NFS filesystems.") can be
removed.
Link: http://lkml.kernel.org/r/20170103182234.30141-2-npiggin@xxxxxxxxx
Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Cc: Anna Schumaker <anna.schumaker@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/nfs/write.c | 2 --
1 file changed, 2 deletions(-)
diff -puN fs/nfs/write.c~nfs-no-pg_private-waiters-remain-remove-waker fs/nfs/write.c
--- a/fs/nfs/write.c~nfs-no-pg_private-waiters-remain-remove-waker
+++ a/fs/nfs/write.c
@@ -728,8 +728,6 @@ static void nfs_inode_remove_request(str
if (likely(head->wb_page && !PageSwapCache(head->wb_page))) {
set_page_private(head->wb_page, 0);
ClearPagePrivate(head->wb_page);
- smp_mb__after_atomic();
- wake_up_page(head->wb_page, PG_private);
clear_bit(PG_MAPPED, &head->wb_flags);
}
nfsi->nrequests--;
_
Patches currently in -mm which might be from npiggin@xxxxxxxxx are
nfs-no-pg_private-waiters-remain-remove-waker.patch
mm-un-export-wake_up_page-functions.patch
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