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Date: Thu, 22 Nov 2007 12:06:43 +0900 From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, James.Bottomley@...senPartnership.com Subject: Re: 2.6.24-rc3-mm1 (sync is slow ?) On Wed, 21 Nov 2007 00:49:09 -0800 Andrew Morton <akpm@...ux-foundation.org> wrote: > On Wed, 21 Nov 2007 17:42:15 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote: > > > Hi, Andrew > > > > I got following result in 'sync' command. > > It was too slow. (memory controller config is off ;) > > I attaches my .config. > > == > > [2.6.24-rc3-mm1] > > [kamezawa@...test2 ~]$ dd if=/dev/zero of=./tmpfile bs=4096 count=100000 > > 100000+0 records in > > 100000+0 records out > > 409600000 bytes (410 MB) copied, 1.46706 seconds, 279 MB/s > > [kamezawa@...test2 ~]$ time sync > > > > real 3m6.440s > > user 0m0.000s > > sys 0m0.133s > Well I wonder how we did that. > > It seems OK here from a quick test (i386, ext3-on-IDE). > > Maybe device driver/block breakage? > I confirmed This slowdown is caused by git-scsi-misc.patch. I'm sorry that I can't chase more and will be offline in this weekend. This is scsi_mod information in /proc/modules = scsi_mod 409416 8 mptctl,sg,lpfc,scsi_transport_fc,mptspi,mptscsih,scsi_transport_spi,sd_mod, Live 0xa000000202818000 = What information should I provide more ? Thanks, -Kame - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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