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| author | NeilBrown <neilb@suse.de> | 2014-09-24 03:28:32 +0200 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-09-25 14:25:47 +0200 |
| commit | 1aff52562939485e503936e17934be077ffaea53 (patch) | |
| tree | 16dba0b5ce0005389ea045e29f69c6b65d133e32 /net/sunrpc/sched.c | |
| parent | NFS: avoid waiting at all in nfs_release_page when congested. (diff) | |
| download | linux-1aff52562939485e503936e17934be077ffaea53.tar.xz linux-1aff52562939485e503936e17934be077ffaea53.zip | |
NFS/SUNRPC: Remove other deadlock-avoidance mechanisms in nfs_release_page()
Now that nfs_release_page() doesn't block indefinitely, other deadlock
avoidance mechanisms aren't needed.
- it doesn't hurt for kswapd to block occasionally. If it doesn't
want to block it would clear __GFP_WAIT. The current_is_kswapd()
was only added to avoid deadlocks and we have a new approach for
that.
- memory allocation in the SUNRPC layer can very rarely try to
->releasepage() a page it is trying to handle. The deadlock
is removed as nfs_release_page() doesn't block indefinitely.
So we don't need to set PF_FSTRANS for sunrpc network operations any
more.
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'net/sunrpc/sched.c')
| -rw-r--r-- | net/sunrpc/sched.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index 9358c79fd589..fe3441abdbe5 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -821,9 +821,7 @@ void rpc_execute(struct rpc_task *task) static void rpc_async_schedule(struct work_struct *work) { - current->flags |= PF_FSTRANS; __rpc_execute(container_of(work, struct rpc_task, u.tk_work)); - current->flags &= ~PF_FSTRANS; } /** |