Re: [PATCH 2/3] sysfs: Fix and sysfs_mv_dir by using lock_rename.

[Dave Hansen]

On Tue, 2008-10-07 at 03:51 -0700, Eric W. Biederman wrote:
> sysfs_mv_dir picks an arbitrary mutex lock ordering and busy waits
> until it can grab the inode mutexes in that order.  This can dead lock
> on UP systems.
> 
> Instead use the generic lock_rename that guarantees we grab parent
> directories before child directories, so there is not need to spin and
> no chance of deadlock.

This is a vast improvement over what was there before.  Nice!

-- Dave

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