提交 0d88f6e8 编写于 作者: D Dave Chinner 提交者: Linus Torvalds

nfs: don't call __mark_inode_dirty while holding i_lock

nfs_scan_commit() is called with the inode->i_lock held, but it then
calls __mark_inode_dirty() while still holding the lock. This causes
a deadlock.

Push the inode->i_lock into nfs_scan_commit() so it can protect only
the parts of the code it needs to and can be dropped before the call
to __mark_inode_dirty() to avoid the deadlock.
Signed-off-by: NDave Chinner <dchinner@redhat.com>
Tested-by: NWill Simoneau <simoneau@ele.uri.edu>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 95042f9e
......@@ -542,11 +542,15 @@ nfs_scan_commit(struct inode *inode, struct list_head *dst, pgoff_t idx_start, u
if (!nfs_need_commit(nfsi))
return 0;
spin_lock(&inode->i_lock);
ret = nfs_scan_list(nfsi, dst, idx_start, npages, NFS_PAGE_TAG_COMMIT);
if (ret > 0)
nfsi->ncommit -= ret;
spin_unlock(&inode->i_lock);
if (nfs_need_commit(NFS_I(inode)))
__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
return ret;
}
#else
......@@ -1483,9 +1487,7 @@ int nfs_commit_inode(struct inode *inode, int how)
res = nfs_commit_set_lock(NFS_I(inode), may_wait);
if (res <= 0)
goto out_mark_dirty;
spin_lock(&inode->i_lock);
res = nfs_scan_commit(inode, &head, 0, 0);
spin_unlock(&inode->i_lock);
if (res) {
int error;
......
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