Re: XFS on RBD deadlock

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On Tue, Nov 29, 2016 at 12:17:08PM +0100, Lucas Stach wrote:
> 2. RBD worker is trying to handle the XFS block request, but the
> involved crypto code recurses into the XFS superblock shrinker, as it's
> trying to allocate memory with GFP_KERNEL in __crypto_alloc_tfm.

And that's where the issues start - crypto_alloc_skcipher and friends
are not intended to be called from the writeback path.
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