linux-kernel - 2.6.18 very slow sync to disk with ext3 fs on an md raid10 array

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Date:	Wed, 27 Aug 2008 22:03:02 -0500
From:	"Don Dupuis" <dondster@...il.com>
To:	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org
Subject: 2.6.18 very slow sync to disk with ext3 fs on an md raid10 array

I have a 12 drive system running 2.6.18.8 with a 11 drive md array.
This array is setup with raid10 and a combination of ext3 and ext2
filesystems. The issue I am having is this. I transfer a 180MB file
with scp to the ext3 filesystem. When this is complete, I will then do
a sync to make sure it is written to disk. The problem is that it will
take 6 MINUTES for the sync to complete. If I do the same thing to the
ext2 filesystem, it will take about 6 seconds. I know that 2.6.19
kernel solves my problem, but the project I am working on requires
2.6.18. I am trying to figure out which patch or patches that went in
to 2.6.19-rc1 fixes this. PLease give me suggestions. I will give
needed data that will be asked for. One more thing, this is an X86_64
kernel on an Intel quad core processor. The disk controller is an LSI
sas controller.

Thanks

Don
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/