Date: Mon, 30 Mar 2009 16:10:40 +0400 From: Vladimir Ermakov <samflanker@gmail.com> To: freebsd-scsi@freebsd.org Subject: Re: aac does not respond with SCHED_ULE Message-ID: <49D0B6C0.6070106@gmail.com> In-Reply-To: <49D0A829.1070702@gmail.com> References: <49D0A829.1070702@gmail.com>
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Vladimir Ermakov wrote: > continuation of the old topic > http://lists.freebsd.org/pipermail/freebsd-hackers/2009-March/028037.html > > Hi, all. > > Describe my problem: > Using the logical drive (RAID-10) on Adaptec 5805 [firmware build: > 16501]. Try to read a file from this logical drive. As a result, the > controller does not respond. > > I found a reason. The problem in using the scheduler SCHED_ULE with > the aac driver. > Shows the results of my experiments. > > system | scheduler | operation | result > 7.1-RELEASE amd64 | SCHED_ULE | read a file | failed (controller > does not respond) > 7.1-RELEASE amd64 | SCHED_4BSD | read a file | passed > sorry, my experiment with 7.1-RELEASE amd64 (SCHED_4BSD) is crashed # ls -halt ibdata1 -rw-rw---- 1 mysql mysql 256G Mar 22 23:23 ibdata1 # cat ibdata1 | pv -brt > /dev/null 13GB 0:01:15 [ 0B/s ] controller does not respond, system -> freeze differences: system | result 7.1-RELEASE amd64 with SCHED_ULE | read only 6.5GB of file 7.1-RELEASE amd64 with SCHED_4BSD | read only 13GB of file /Vladimir Ermakov
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