From: "Rainer Fügenstein" <rfu@oudeis.org>
To: Neil Brown <nfbrown@novell.com>, Linux-RAID <linux-raid@vger.kernel.org>
Subject: performance issue (was: Re: kernel: BUG: soft lockup - CPU#1 stuck for 60s!)
Date: Sat, 24 Oct 2015 18:15:41 +0200 [thread overview]
Message-ID: <43246687.20151024181541@oudeis.org> (raw)
In-Reply-To: <87si5bvcj4.fsf@notabene.neil.brown.name>
hi,
> I strongly recommend adding a write-intend bitmap
> mdadm --grow /dev/md0 --bitmap=internal
I did as suggested, but now it feels like performance has dropped to
about 1/4th of what it used to be before. since this system is already
pretty slow by design, this is quite frustrating.
no soft-lockups so far, fortunately.
may a new kernel speed things up again? or can --bitmap=internal be
undone?
(need some time to prepare the upgrade to a new OS release)
tnx & cu
--
Best regards,
Rainer mailto:rfu@oudeis.org
next prev parent reply other threads:[~2015-10-24 16:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-15 13:38 kernel: BUG: soft lockup - CPU#1 stuck for 60s! [md0_raid5:1614] Rainer Fügenstein
2015-10-16 1:15 ` Neil Brown
2015-10-16 19:31 ` Rainer Fügenstein
2015-10-24 16:15 ` Rainer Fügenstein [this message]
2015-10-24 16:31 ` performance issue (was: Re: kernel: BUG: soft lockup - CPU#1 stuck for 60s!) Roman Mamedov
2015-10-25 19:23 ` Rainer Fügenstein
2015-10-25 20:08 ` Neil Brown
2015-10-25 20:32 ` Rainer Fügenstein
2015-10-25 21:10 ` Neil Brown
2015-11-02 22:55 ` performance issue Rainer Fügenstein
2015-11-03 1:34 ` Neil Brown
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=43246687.20151024181541@oudeis.org \
--to=rfu@oudeis.org \
--cc=linux-raid@vger.kernel.org \
--cc=nfbrown@novell.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.