diff options
author | David Jeffery <djeffery@redhat.com> | 2014-08-05 11:19:42 -0400 |
---|---|---|
committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-08-22 18:04:44 -0400 |
commit | 92a56555bd576c61b27a5cab9f38a33a1e9a1df5 (patch) | |
tree | d25e9c5821615dcb0e48d37373f36a0baa7f3e85 /fs/nfs/pagelist.c | |
parent | 78270e8fbc2916bfc8305b8f58f33474cce1ec0e (diff) |
nfs: Don't busy-wait on SIGKILL in __nfs_iocounter_wait
If a SIGKILL is sent to a task waiting in __nfs_iocounter_wait,
it will busy-wait or soft lockup in its while loop.
nfs_wait_bit_killable won't sleep, and the loop won't exit on
the error return.
Stop the busy-wait by breaking out of the loop when
nfs_wait_bit_killable returns an error.
Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/pagelist.c')
-rw-r--r-- | fs/nfs/pagelist.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 932c6cc27a76..be7cbce6e4c7 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c | |||
@@ -116,7 +116,7 @@ __nfs_iocounter_wait(struct nfs_io_counter *c) | |||
116 | if (atomic_read(&c->io_count) == 0) | 116 | if (atomic_read(&c->io_count) == 0) |
117 | break; | 117 | break; |
118 | ret = nfs_wait_bit_killable(&q.key); | 118 | ret = nfs_wait_bit_killable(&q.key); |
119 | } while (atomic_read(&c->io_count) != 0); | 119 | } while (atomic_read(&c->io_count) != 0 && !ret); |
120 | finish_wait(wq, &q.wait); | 120 | finish_wait(wq, &q.wait); |
121 | return ret; | 121 | return ret; |
122 | } | 122 | } |