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From: Jens Axboe <axboe@fb.com>
To: David Rientjes <rientjes@google.com>,
	Lars Ellenberg <drbd-dev@lists.linbit.com>
Cc: <linux-kernel@vger.kernel.org>, <drbd-user@lists.linbit.com>
Subject: Re: [patch 1/2] block, drbd: fix drbd_req_new() initialization
Date: Sat, 7 Mar 2015 17:33:55 -0700	[thread overview]
Message-ID: <54FB98F3.2050308@fb.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1503071623250.31688@chino.kir.corp.google.com>

On 03/07/2015 05:24 PM, David Rientjes wrote:
> mempool_alloc() does not support __GFP_ZERO since elements may come from
> memory that has already been released by mempool_free().
>
> Remove __GFP_ZERO from mempool_alloc() in drbd_req_new() and properly
> initialize it to 0.

You should add it to mempool instead, avoid having this issue show up 
for other folks as well. It'd be trivial to do. Normal ->alloc() should 
honor __GFP_ZERO, just do the same manually for removing an item from 
the internal pool.

-- 
Jens Axboe


  parent reply	other threads:[~2015-03-08  0:34 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-08  0:24 David Rientjes
2015-03-08  0:24 ` [patch 2/2] block, drbd: use mempool_create_slab_pool() David Rientjes
2015-03-08  0:33 ` Jens Axboe [this message]
2015-03-08  0:53   ` [patch 1/2] block, drbd: fix drbd_req_new() initialization David Rientjes
2015-03-08  1:03     ` Jens Axboe
2015-03-08  1:27       ` David Rientjes
2015-03-08  1:45         ` Jens Axboe
2015-03-13 23:24         ` David Rientjes
2015-03-10 10:38 ` [DRBD-user] " Lars Ellenberg
2015-03-10 19:28   ` David Rientjes

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