From: john clyne <clyne@ucar.edu>
To: linux-scsi@vger.kernel.org
Subject: IO transfer limits
Date: Wed, 10 Jan 2007 08:16:24 -0800 (PST) [thread overview]
Message-ID: <8260533.post@talk.nabble.com> (raw)
Can anyone give me some guidance on where in the IO stack I might be running
into a 512KB limit on IO transfer sizes to an external FC device? I've
checked IO scheduler parameter
(/sys/block/<dev>/queue/{max_sectors_kb,max_hw_sectors_kb}. Both are set to
32767. I'm using Qlogic HBAs (qla2312), but I don't see any relevent
parameters. I'm running RHEL 4.0 with a 2.6.9-34 kernel. Any pointers would
be greatly appreciated.
cheers - jc
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next reply other threads:[~2007-01-10 16:40 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-10 16:16 john clyne [this message]
2007-01-10 17:40 ` IO transfer limits Mike Christie
2007-01-10 23:47 ` john clyne
2007-01-11 1:15 ` Douglas Gilbert
2007-01-11 16:13 ` Stefan Richter
2007-01-11 21:50 ` Douglas Gilbert
2007-01-12 0:54 ` Stefan Richter
2007-01-12 22:27 ` john clyne
2007-01-10 18:38 ` Douglas Gilbert
2007-01-10 23:07 ` john clyne
2007-01-11 18:23 ` James Bottomley
2007-01-11 19:48 ` john clyne
2007-01-12 1:17 ` James Bottomley
2007-01-11 19:23 ` no utility / method to show association between host bus adapter and non-sg BLOCK devices Thayne Harmon
2007-01-11 20:15 ` Douglas Gilbert
[not found] ` <45AE22E0.DB3A.00B8.0@novell.com>
2007-01-17 21:04 ` no utility / method to show association between HBA & non-sg BLOCK (scsi) devices - register_blkdev() Douglas Gilbert
2007-01-17 22:06 ` Andrew Patterson
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