From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: SCSI ERRORS triggered by BIO_VMERGE_BOUNDARY
Date: Mon, 23 Jun 2003 22:14:44 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105640705631100@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105604433402604@msgid-missing>
>>>>> On Mon, 23 Jun 2003 15:05:49 -0700, Grant Grundler <iod00d@hp.com> said:
>> The decision has to be split across BIO and I/O MMU: only the
>> BIO-level knows what to do if merging _cannot_ take place and
>> only the I/O MMU code knows how to map physically discontiguous
>> pages linearly into I/O MMU space.
Grant> I understand the latter. Not the former.
Grant> It looks like blk_recount_segments() is only used to gather
Grant> stastics about how many segments are in the transaction. I
Grant> tracked back to fs/bio.c to find the consumer of this
Grant> information (# of segments) but didn't find it. Anyone know
Grant> off hand?
I think you're talking to the wrong people. If you want to change the
BIO layer, talk to Jens Axboe et al.
--david
next prev parent reply other threads:[~2003-06-23 22:14 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-19 17:36 SCSI ERRORS triggered by BIO_VMERGE_BOUNDARY David Mosberger
2003-06-19 20:48 ` Jesse Barnes
2003-06-19 21:47 ` Grant Grundler
2003-06-23 7:11 ` Grant Grundler
2003-06-23 15:04 ` Alex Williamson
2003-06-23 16:52 ` David Mosberger
2003-06-23 20:24 ` Grant Grundler
2003-06-23 20:41 ` David Mosberger
2003-06-23 22:05 ` Grant Grundler
2003-06-23 22:14 ` David Mosberger [this message]
2003-06-24 21:07 ` Grant Grundler
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