From: Mike Christie <michaelc@cs.wisc.edu>
To: SCSI Mailing List <linux-scsi@vger.kernel.org>
Cc: Jens Axboe <axboe@suse.de>
Subject: Re: [PATCH RFC] allow bio code to unmap sg io requests and have blk_execute_rq_nowait bounce bios
Date: Fri, 29 Jul 2005 04:28:11 -0500 [thread overview]
Message-ID: <42E9F6AB.5090008@cs.wisc.edu> (raw)
In-Reply-To: <1122628800.8900.22.camel@max>
Mike Christie wrote:
> And, as I work on the adding of BLKERR_* error values in replacement
> of the dm-multupath/bio sense patch, I was thinking about your comment
> about having one true make_request function. It seems like if we extended
> bios to handle more request stuff (like what is needed for SG IO) we could
> just pass the bio to __make_request - with some modifications to __make_request -
> instead of doing it request based and moving the blk_queue_bounce call to
> blk_execute_rq_nowait like I did in my patch. Is this what you were thinking when
> adding the bio sense code?
I mean doing things like sg io and dm-multipath HW handler's manual
failover with bios instead of requests could simplify those things, but
I am guessing bios were not meant to handle some of the lower level
details like SCSI things. Or maybe they are or should be done in a more
generic way?
next prev parent reply other threads:[~2005-07-29 9:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-29 9:20 [PATCH RFC] allow bio code to unmap sg io requests and have blk_execute_rq_nowait bounce bios Mike Christie
2005-07-29 9:28 ` Mike Christie [this message]
[not found] ` <20050802084905.GC22569@suse.de>
2005-08-06 16:25 ` Mike Christie
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