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Message-ID: <1e62d1370601250127r50eaf50dg5ad705877dbf771c@mail.gmail.com>
Date: Wed, 25 Jan 2006 14:27:22 +0500
From: Fawad Lateef <fawadlateef@gmail.com>
To: Coywolf Qi Hunt <qiyong@fc-cn.com>
Subject: Re: Block device API
Cc: Joshua Hudson <joshudson@gmail.com>, linux-kernel@vger.kernel.org
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On 1/25/06, Coywolf Qi Hunt <qiyong@fc-cn.com> wrote:
> On Wed, Jan 25, 2006 at 08:17:02AM +0500, Fawad Lateef wrote:
> >
> > AFAIK there isn't any documentation/article for block and filesystem
> > layer interaction (or till now me also not able to find any) :)
> >
> >
> > sb_bread is the function used for reading a block (especially
> > superblock) from the storage. For reading/writing do look at
>
> Does __bread() contribute to page cache? I think not. And we don't
> care the work done by __bread().
>

Ya, __bread() directly sends read request to the block device without
involvement of buffer cache ! Is there any point In my explaination in
which I mentioned __bread related to buffer_cache ? if yes then its a
mistake .... and __bread is direct function which calls submit_bh and
waits for its completion.

--
Fawad Lateef
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