Re: [PATCH] Btrfs: fix ->iterate_shared() by upgrading i_rwsem for delayed nodes

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On Fri, May 20, 2016 at 01:50:33PM -0700, Omar Sandoval wrote:
> Commit fe742fd4f90f ("Revert "btrfs: switch to ->iterate_shared()"")
> backed out the conversion to ->iterate_shared() for Btrfs because the
> delayed inode handling in btrfs_real_readdir() is racy. However, we can
> still do readdir in parallel if there are no delayed nodes.

So this is for current master (pre 4.7-rc1), I'll add an appropriate
merge point for to my for-next.
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