From: Jeff Dike <jdike@addtoit.com>
To: Blaisorblade <blaisorblade@yahoo.it>
Cc: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] Re: "Sleeping in atomic section" with ubd aio patch
Date: Wed, 14 Sep 2005 17:18:08 -0400 [thread overview]
Message-ID: <20050914211808.GA11567@ccure.user-mode-linux.org> (raw)
In-Reply-To: <200509142200.39886.blaisorblade@yahoo.it>
On Wed, Sep 14, 2005 at 10:00:39PM +0200, Blaisorblade wrote:
> Assuming it can be done, it'd be ok.
>
> However, why have we already dequeued the request?
It is easier than removing segments from the request and finally
dequeueing the request when it is finally empty.
> Looking for examples, via grep blkdev_dequeue_request drivers/ide/*.c and
> going opening drivers/ide/ide-io.c, I found blkdev_dequeue_request() called
> *after* end_that_request_first(), while there it's called before.
>
> A comment in blk_start_pre_flush() says there's some freedom, but probably
> leaving the request in the queue would be ok....
There is a good amount of freedom. The driver is given a set of
requests, and has the job of making them happen.
Jeff
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next prev parent reply other threads:[~2005-09-14 21:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-13 18:01 [uml-devel] "Sleeping in atomic section" with ubd aio patch Blaisorblade
2005-09-14 19:22 ` [uml-devel] " Jeff Dike
2005-09-14 20:00 ` Blaisorblade
2005-09-14 21:18 ` Jeff Dike [this message]
2005-09-16 19:20 ` Blaisorblade
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