linux-kernel - Re: 2.6.24-rc3-mm1 (sync is slow ?)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20071122120643.c293c617.kamezawa.hiroyu@jp.fujitsu.com>
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/