linux-kernel - Re: [PATCH] Add block device speciffic splice write method

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Message-ID: <20081020174931.GH19428@kernel.dk>
Date:	Mon, 20 Oct 2008 19:49:32 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Dmitri Monakhov <dmonakhov@...nvz.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] Add block device speciffic splice write method

On Sun, Oct 19 2008, Dmitri Monakhov wrote:
> Block device write procedure is different from regular file:
>  - Actual write performed without i_mutex.
>  - It has no metadata, so generic_osync_inode(O_SYNCMETEDATA) can not livelock.
>  - We do not have to worry about S_ISUID/S_ISGID bits.

I already did an O_DIRECT part of block device splicing [1], I'll fold
this into the splice branch and double check with some testing.

[1] http://git.kernel.dk/?p=linux-2.6-block.git;a=commitdiff;h=fbb724a0484aba938024d41ca1dd86337d2550c9;hp=08c7910b275a4c580ad646ae8654439c8dfae4c5

-- 
Jens Axboe

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