linux-kernel - Re: [DRBD-user] [patch 1/2] block, drbd: fix drbd_req

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Date:	Tue, 10 Mar 2015 11:38:38 +0100
From:	Lars Ellenberg <lars.ellenberg@...bit.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Jens Axboe <axboe@...com>, drbd-dev@...ts.linbit.com,
	linux-kernel@...r.kernel.org
Subject: Re: [DRBD-user] [patch 1/2] block, drbd: fix drbd_req_new()
 initialization

On Sat, Mar 07, 2015 at 04:24:02PM -0800, 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.

We used to have the explicit memset there,
but then changed that, because

I was under the impression that since
2007-07-17 d07dbea, Slab allocators: support __GFP_ZERO in all allocators
it was supported?

	Lars Ellenberg

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