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From: "Michał Zubkowicz" <michal.zubkowicz@gmail.com>
To: dm-devel@redhat.com
Subject: System freeze for few seconds when using dm-cache on high load
Date: Wed, 14 Jan 2015 13:34:54 +0100	[thread overview]
Message-ID: <54B6626E.8020606@gmail.com> (raw)

I'm using dm-cache on such setup:
dm-cache -> luks -> lvm2 ->ext4
Kernel version: 3.13.0-43

On high disk load (ie when saving virtual machine state) whole system 
freezes for a few seconds.
I've tried already to change scheduler (from deadline to cbq), change 
ext4 mount options, now i've got:
errors=remount-ro,noatime,nodiratime,discard,barrier=0,relatime

There is something I should check, or maybe it's a 'normal' behaviour, 
or maybe my  whole setup is wrong?

-- 
Best Regards
Michał Zubkowicz

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https://www.redhat.com/mailman/listinfo/dm-devel

             reply	other threads:[~2015-01-14 12:34 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-14 12:34 Michał Zubkowicz [this message]
2015-02-22 21:39 ` System freeze for few seconds when using dm-cache on high load Anssi Hannula

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