linux-kernel - Re: [PATCH 2/2] fs/fuse, splice_write: reduce allocation size.

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Message-ID: <d1bcfeb2-8e74-f4a7-225e-9d78ffb4263e@virtuozzo.com>
Date:   Tue, 17 Jul 2018 18:45:11 +0300
From:   Andrey Ryabinin <aryabinin@...tuozzo.com>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] fs/fuse, splice_write: reduce allocation size.

On 07/17/2018 05:47 PM, Miklos Szeredi wrote:
> On Mon, Jul 16, 2018 at 6:03 PM, Andrey Ryabinin
> <aryabinin@...tuozzo.com> wrote:
>> The 'bufs' array contains 'pipe->buffers' elements, but the
>> fuse_dev_splice_write() uses only 'pipe->nrbufs' elements.
> 
> Hmm, only valid with pipe lock held, AFAICS.
> 
> True for using ->buffers as well...
> 
> Would you mind resending this series with an additional starting patch
> that moves the bufs allocations inside pipe_lock()/pipe_unlock() to
> fix races with fcntl(F_SETPIPE_SZ).
> 

Sure, will do shortly.
I suppose the patch should go with a stable tag, right?

> Thanks,
> Miklos
>