From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matthew Wilcox <matthew@wil.cx>
Subject: Re: might_sleep warnings in gereric_make_request
Date: Wed, 19 Apr 2006 21:31:08 -0600
Message-ID: <20060420033108.GO24104@parisc-linux.org>
References: <200604201105448287687@gmail.com>
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To: Zhikun Wang <raidwang@gmail.com>
Cc: Neil Brown <neilb@suse.de>, linux-raid <linux-raid@vger.kernel.org>, linux-scsi <linux-scsi@vger.kernel.org>, Eric Moore <Eric.Moore@lsil.com>
List-Id: linux-raid.ids

On Thu, Apr 20, 2006 at 11:05:55AM +0800, Zhikun Wang wrote:
> Hi:
> 	I want to call genric_make_request in bio->bi_end_io function. But it incurs might_sleep warnings! I wonder this method is safe in the kernel? Thanks a lot! 
> 
> 
> cfq: depth 4 reached, tagging now on
> Debug: sleeping function called from invalid context at drivers/block/ll_rw_blk.c:2878
> in_atomic():1, irqs_disabled():0

You can't call generic_make_request() from interrupt context.  What are
you trying to do?