From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: stable@vger.kernel.org, Minchan Kim <minchan@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Kyeongdon Kim <kyeongdon.kim@lge.com>,
linux-kernel@vger.kernel.org,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Subject: Re: [stable] upstream 3d5fe03a3ea01 -stable backport request
Date: Mon, 25 Jan 2016 22:01:20 +0900 [thread overview]
Message-ID: <20160125130120.GD526@swordfish> (raw)
In-Reply-To: <20160125124654.GA526@swordfish>
On (01/25/16 21:46), Sergey Senozhatsky wrote:
>
> Hello,
>
> Please add upstream 'commit 3d5fe03a3ea01 ("zram/zcomp: use
> GFP_NOIO to allocate streams")' to stable releases.
>
[v3.15+]
-ss
>
> :commit 3d5fe03a3ea013060ebba2a811aeb0f23f56aefa
> :Author: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
> :
> : zram/zcomp: use GFP_NOIO to allocate streams
> :
> : We can end up allocating a new compression stream with GFP_KERNEL from
> : within the IO path, which may result is nested (recursive) IO
> : operations. That can introduce problems if the IO path in question is a
> : reclaimer, holding some locks that will deadlock nested IOs.
> :
> : Allocate streams and working memory using GFP_NOIO flag, forbidding
> : recursive IO and FS operations.
>
>
> -ss
>
prev parent reply other threads:[~2016-01-25 13:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-25 12:46 [stable] upstream 3d5fe03a3ea01 -stable backport request Sergey Senozhatsky
2016-01-25 13:01 ` Sergey Senozhatsky [this message]
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