I'm not clear what you rolled back there as r255173 has ntothing to do
with this. Could you clarify
Any errors recorded in /var/log/messages?
Could you add code to record the none zero value of zio->io_error in
l2arc_read_done as this may give some indication of the underlying
issue.
Additionally could always put a panic in that code path too and then
create a dump so the details can be fully exhamined.
In terms of the slowness thats going to be a side effect of the cache
failures.
Oh could you also confirm that the issue doesn't exist if you
1. Exclude r255753
2. Set vfs.zfs.max_auto_ashift=9
Regards
Steve
----- Original Message -----
From: "Vitalij Satanivskij" <sa...@ukr.net>
To: "Steven Hartland" <kill...@multiplay.co.uk>
Cc: "Vitalij Satanivskij" <sa...@ukr.net>; "Dmitriy Makarov" <suppor...@ukr.net>; "Justin T. Gibbs" <gi...@freebsd.org>; "Borja
Marcos" <bor...@sarenet.es>; <freebsd-current@freebsd.org>
Sent: Wednesday, October 16, 2013 3:10 PM
Subject: Re: ZFS secondarycache on SSD problem on r255173
Yes
We have 15 servers, all of them have problem while using with patch fo ashift,
sh we rollback path (for r255173)
and all of them works for a week without that's problem's. Yesterday one of of
servers was updated to stable/10 (beta1)
wich include patch and after around 12 hours of works l2arc begin et errors
like that
kstat.zfs.misc.arcstats.l2_cksum_bad
kstat.zfs.misc.arcstats.l2_io_error
For now patch disabled in ower production.
Please note we have very heavy load on zfs pool so 90GB arc and 3x180Gb L2arc
have very big hit's on it on it.
SSD used for cache's is intel ssd 530 series smart for all devices in in normal
states's
no bad values on it.
Steven Hartland wrote:
SH> Have you confirmed the ashift changes are the actual cause of this
SH> by backing out just those changes and retesting on the same hardware.
SH>
SH> Also worth checking your disks smart values to confirm there are no
SH> visible signs of HW errors.
SH>
SH> Regards
SH> Steve
SH>
SH> ----- Original Message -----
SH> From: "Vitalij Satanivskij" <sa...@ukr.net>
SH> To: "Dmitriy Makarov" <suppor...@ukr.net>
SH> Cc: "Steven Hartland" <kill...@multiplay.co.uk>; "Justin T. Gibbs" <gi...@freebsd.org>;
"Borja Marcos" <bor...@sarenet.es>;
SH> <freebsd-current@freebsd.org>
SH> Sent: Wednesday, October 16, 2013 9:01 AM
SH> Subject: Re: ZFS secondarycache on SSD problem on r255173
SH>
SH>
SH> > Hello.
SH> >
SH> > Patch brocke cache functionality.
SH> >
SH> > Look at's Dmitriy's mail from Mon, 07 Oct 2013 21:09:06 +0300
SH> >
SH> > With subject ZFS L2ARC - incorrect size and abnormal system load on
r255173
SH> >
SH> > As patch alredy in head and BETA it's not good.
SH> >
SH> > Yesterday we update one machine up to beta1 and forgot about patch. So 12
Hours and cache broken... :((
SH> >
SH> >
SH> >
SH> > Dmitriy Makarov wrote:
SH> > DM> The attached patch by Steven Hartland fixes issue for me too. Thank
you!
SH> > DM>
SH> > DM>
SH> > DM> --- Исходное сообщение ---
SH> > DM> От кого: "Steven Hartland" < kill...@multiplay.co.uk >
SH> > DM> Дата: 18 сентября 2013, 01:53:10
SH> > DM>
SH> > DM> ----- Original Message -----
SH> > DM> From: "Justin T. Gibbs" <
SH> > DM>
SH> > DM> ---
SH> > DM> Дмитрий Макаров
SH> > DM> _______________________________________________
SH> > DM> freebsd-current@freebsd.org mailing list
SH> > DM> http://lists.freebsd.org/mailman/listinfo/freebsd-current
SH> > DM> To unsubscribe, send any mail to
"freebsd-current-unsubscr...@freebsd.org"
SH> >
SH>
SH>
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