From: Milan Broz <mbroz@redhat.com>
To: Marc MERLIN <marc@merlins.org>
Cc: dm-crypt@saout.de, Yves-Alexis Perez <corsac@debian.org>
Subject: Re: [dm-crypt] aes-xts-plain with aes_x86_64 makes my SSD 5x slower than my encrypted HD
Date: Mon, 23 Jul 2012 23:31:28 +0200 [thread overview]
Message-ID: <500DC2B0.8060409@redhat.com> (raw)
In-Reply-To: <20120723175129.GA15867@merlins.org>
On 07/23/2012 07:51 PM, Marc MERLIN wrote:
> On Mon, Jul 23, 2012 at 07:15:24PM +0200, Milan Broz wrote:
>>> Mmmh, I have one possible thing. I have a preempt kernel. Could that be it?
>>> http://marc.merlins.org/tmp/config-3.4.4-amd64-preempt.txt
>>
>> Can you send me your kernel .config then? Preempt should not be problem.
>> Which kernel version? which architecture? Any additional patches over
>> mainline code?
>
> I just sent you my config, it was in the URL above :)
> No patches, kernel 3.4.4 from kernel.org, see above.
Ehm... sorry, I completely missed that. Thanks.
> Really?
> I used fdisk -H32 -S32 /dev/sda as recomended on
> http://www.void.gr/kargig/blog/2012/01/11/linux-ssd-partition-alignment-tips/
Do not use -H32 -S32. It is crazy and obsolete way how to align it...
Someone is wrong in the internet seems http://xkcd.com/386/ ;-)
Disk driver should set topology parameters which fdisk uses. But for your
case all is set to 512 bytes...
Whatever, there was a bug in fdisk, fixed now thanks to your report :)
https://github.com/karelzak/util-linux/commit/c0175e6185ac81843cbad33cbea75abd033f0e66
> Thanks for the other suggestions. Hopefully we'll nail this somehow :)
Well, please try some default distro compiled kernel if you can reproduce it there.
Milan
next prev parent reply other threads:[~2012-07-23 21:31 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-22 19:07 [dm-crypt] aes-xts-plain with aes_x86_64 makes my SSD 5x slower than my encrypted HD Marc MERLIN
2012-07-22 19:47 ` Yves-Alexis Perez
2012-07-22 20:39 ` Marc MERLIN
2012-07-22 21:47 ` Arno Wagner
2012-07-23 6:07 ` Yves-Alexis Perez
2012-07-23 6:28 ` Marc MERLIN
2012-07-23 8:14 ` Arno Wagner
2012-07-23 10:46 ` Milan Broz
2012-07-23 11:09 ` Yves-Alexis Perez
2012-07-23 11:37 ` Milan Broz
2012-07-23 15:08 ` André Gall
2012-07-23 17:27 ` André Gall
2012-07-24 14:06 ` Heinz Diehl
2012-07-24 14:16 ` Milan Broz
2012-07-23 16:12 ` Marc MERLIN
2012-07-23 16:19 ` Yves-Alexis Perez
2012-07-23 17:54 ` Marc MERLIN
2012-07-23 19:26 ` Yves-Alexis Perez
2012-07-23 17:15 ` Milan Broz
2012-07-23 17:51 ` Marc MERLIN
2012-07-23 21:31 ` Milan Broz [this message]
2012-07-24 5:57 ` Marc MERLIN
2012-07-24 6:25 ` Heinz Diehl
2012-07-24 15:02 ` Marc MERLIN
2012-07-24 15:19 ` Milan Broz
2012-07-24 16:09 ` Marc MERLIN
2012-07-24 13:54 ` Milan Broz
[not found] ` <500E9099.8050501@redhat.com>
2012-07-24 14:27 ` Heinz Diehl
2012-07-24 14:58 ` Heinz Diehl
2012-07-24 15:38 ` Marc MERLIN
2012-07-24 16:48 ` Heinz Diehl
2012-07-24 6:11 ` Heinz Diehl
2012-07-22 21:55 ` Marc MERLIN
2012-07-22 20:22 ` Heinz Diehl
2012-08-12 12:49 ` Pasi Kärkkäinen
2012-08-16 7:43 ` Marc MERLIN
[not found] ` <502D1F96.3080905@andregall.de>
2012-08-16 17:57 ` Marc MERLIN
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=500DC2B0.8060409@redhat.com \
--to=mbroz@redhat.com \
--cc=corsac@debian.org \
--cc=dm-crypt@saout.de \
--cc=marc@merlins.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox