* [Bug 349] New: stripped MD0 splits requests incorrectly
@ 2003-02-12 1:35 Martin J. Bligh
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From: Martin J. Bligh @ 2003-02-12 1:35 UTC (permalink / raw)
To: linux-kernel
http://bugme.osdl.org/show_bug.cgi?id=349
Summary: stripped MD0 splits requests incorrectly
Kernel Version: See 2.5.4x upto 2.5.60
Status: NEW
Severity: blocking
Owner: bugme-janitors@lists.osdl.org
Submitter: ak@suse.de
Distribution: SuSE 8.1
Hardware Environment: Two disk RAID on adaptec SCSI
Software Environment: XFS on MD0 (stripped) on two SCSI disks
Problem Description:
When trying to mount an XF S system on such a RAID system and XFS replays
its log its hits BIO_BUG_ON(!bio->bi_io_vec) in ll_rw_block:submit_bio.
According to axboe the problem is that MD splits requests incorrectly. It
needs to ensure that when splitting requests between each resulting
subrequest is at least one page long. 0 length BIOs as generated here are
illegal.
Fixing requires extended surgery in the MD request splitting.
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2003-02-12 1:35 [Bug 349] New: stripped MD0 splits requests incorrectly Martin J. Bligh
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