From: Asdo <asdo@shiftmail.org>
To: Neil Brown <nfbrown@novell.com>
Cc: mark delfman <markdelfman@googlemail.com>,
linux-raid <linux-raid@vger.kernel.org>
Subject: Re: MD write performance issue - found Catalyst patches
Date: Fri, 06 Nov 2009 11:28:58 +0100 [thread overview]
Message-ID: <4AF3FA6A.4020305@shiftmail.org> (raw)
In-Reply-To: <19187.43892.446870.865231@notabene.brown>
Neil Brown wrote:
> On Thursday November 5, asdo@shiftmail.org wrote:
>
>> incentive for upgrading (Neil, btw, is there any chance those lockups
>> fixes get backported to mainstream 2.6.31.x?).
>
> That would be up to the XFS developers. I suggest you consider asking
> them.
>
Hi Neil, no sorry I meant the patches for md raid lockups like this one:
http://neil.brown.name/git?p=md;a=commitdiff;h=1d9d52416c0445019ccc1f0fddb9a227456eb61b
and those for raid 5,6 for which i don't know the link...
Hm actually I don't see them applied to even mainstream 2.6.32 yet :-(
http://git.kernel.org/?p=linux/kernel/git/djbw/md.git;a=blob_plain;f=drivers/md/raid1.c;hb=2fdc246aaf9a7fa088451ad2a72e9119b5f7f029
am I correct?
The bug can be serious imho depending on the hardware: when I saw it on
my hardware all disk accesses were completely starved forever and it was
even impossible to log-in until the resync finished. It can actually be
worked around by reducing the maximum resync speed, but this is only if
the user knows the trick...
Thank you
next prev parent reply other threads:[~2009-11-06 10:28 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-18 10:00 MD write performance issue - found Catalyst patches mark delfman
2009-10-18 22:39 ` NeilBrown
2009-10-29 6:41 ` Neil Brown
2009-10-29 6:48 ` Thomas Fjellstrom
2009-10-29 7:32 ` Thomas Fjellstrom
2009-10-29 8:08 ` Asdo
2009-10-31 10:51 ` mark delfman
2009-11-03 4:58 ` Neil Brown
2009-11-03 12:11 ` mark delfman
2009-11-04 17:15 ` mark delfman
2009-11-04 17:25 ` Asdo
[not found] ` <66781b10911050904m407d14d6t7d3bec12578d6500@mail.gmail.com>
2009-11-05 19:09 ` Asdo
2009-11-06 4:52 ` Neil Brown
2009-11-06 10:28 ` Asdo [this message]
2009-11-06 10:51 ` Neil F Brown
2009-11-06 15:51 ` mark delfman
2009-11-04 19:05 ` Steve Cousins
2009-11-04 22:08 ` mark delfman
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