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Commit 175359f8 authored by Frederic Weisbecker's avatar Frederic Weisbecker
Browse files

reiserfs: Fix softlockup while waiting on an inode 



When we wait for an inode through reiserfs_iget(), we hold
the reiserfs lock. And waiting for an inode may imply waiting
for its writeback. But the inode writeback path may also require
the reiserfs lock, which leads to a deadlock.

We just need to release the reiserfs lock from reiserfs_iget()
to fix this.

Reported-by: default avatarAlexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Tested-by: default avatarChristian Kujau <lists@nerdbynature.de>
Cc: Chris Mason <chris.mason@oracle.com>
parent bbec9191

fs/reiserfs/inode.c

+2 −0
Original line number Diff line number Diff line
@@ -1497,9 +1497,11 @@ struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key) 


	args.objectid = key->on_disk_key.k_objectid;

	args.dirid = key->on_disk_key.k_dir_id;

	reiserfs_write_unlock(s);

	inode = iget5_locked(s, key->on_disk_key.k_objectid,

			     reiserfs_find_actor, reiserfs_init_locked_inode,

			     (void *)(&args));

	reiserfs_write_lock(s);

	if (!inode)

		return ERR_PTR(-ENOMEM);