Messages in this thread | | | Date | Mon, 2 Jun 2008 20:31:45 +0800 | From | Yan Li <> | Subject | Re: 2.6.24 Kernel Soft Lock Up with heavy I/O in dm-crypt |
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Hi Milan,
On Mon, Jun 02, 2008 at 08:52:00AM +0200, Milan Broz wrote: > Please could you try if patch here helps and doesn't cause performance degradation? > http://www2.kernel.org/pub/linux/kernel/people/agk/patches/2.6/2.6.25/dm-crypt-add-cond_resched.patch
Will the result of testing a Debian 2.6.24-etchnhalf.1-amd64 kernel (very near a vanilla kernel) be of same value? Since the data on some other drives on this server is important so I dare not try 2.6.25-rc on it.
Following is my test plan, comments are welcomed:
Test command: # dd if=/dev/zero of=/dev/mapper/open_device bs=500M count=10 (this server has 2G memory)
The command will be run for 3 times, and average speed of last two runs will be taken as result score.
Dm-crypt LUKS Encryption scenarios: aes-cbc-essiv:sha256, keysize 128 aes-xts-plain, keysize 256 aes-xts-plain, keysize 512
I will compare the speed of all above 3 encryption scenarios, with and without the patch.
-- Li, Yan
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