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ceph: avoid block operation when !TASK_RUNNING (ceph_mdsc_sync)

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check_cap_flush() calls mutex_lock(), which may block. So we can't
use it as condition check function for wait_event();

Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng
2015-01-08 21:30:12 +08:00
committed by Ilya Dryomov
parent 73e39e4dba
commit d3383a8e37
2 changed files with 35 additions and 18 deletions
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2
fs/ceph/caps.c
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@@ -1450,8 +1450,8 @@ static int __mark_caps_flushing(struct inode *inode,
spin_lock(&mdsc->cap_dirty_lock);
list_del_init(&ci->i_dirty_item);
ci->i_cap_flush_seq = ++mdsc->cap_flush_seq;
if (list_empty(&ci->i_flushing_item)) {
ci->i_cap_flush_seq = ++mdsc->cap_flush_seq;
list_add_tail(&ci->i_flushing_item, &session->s_cap_flushing);
mdsc->num_cap_flushing++;
dout(" inode %p now flushing seq %lld\n", inode,