linux-kernel - hanging in fsync for 3+ seconds

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <4783BB41.4010707@cmu.edu>
Date:	Tue, 08 Jan 2008 13:04:49 -0500
From:	George Nychis <gnychis@....edu>
To:	lkml <linux-kernel@...r.kernel.org>
Subject: hanging in fsync for 3+ seconds

Hi all,

I noticed that all of a sudden my disk writes using VIM/EMACS are taking 
3+ seconds for even just a single byte.  So, I've used strace to narrow 
it down to fsync.

The following log is an fsync opening up a new file 'test' inserting a 
't' and writing and quitting in vim:
   http://www.andrew.cmu.edu/user/gnychis/slog

If you do a search for the only fsync, you will see it takes more than 3 
seconds:
   15171      0.000094 fsync(6)            = 0 <3.386504>

What can I do to determine why the fsync is taking so long?  I am not 
getting any disk error messages in system logs.

Info about my system:
   Ubuntu Gutsy Gibbon desktop machine, updated as of last night
   Linux 2.6.22-14-generic #1 SMP i686 GNU/Linux, running reiserFS.

Thanks!
George
--
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/