linux-ext4 - [Bug 14972] [regression] msync() call on ext4 causes disk thrashing

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

Date:	Sat, 2 Jan 2010 15:10:04 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 14972] [regression] msync() call on ext4 causes disk thrashing

http://bugzilla.kernel.org/show_bug.cgi?id=14972





--- Comment #3 from Artem S. Tashkinov <t.artem@...lcity.com>  2010-01-02 15:10:03 ---
(In reply to comment #2)
> Regression from what?  Ext3?  Or some earlier kernel version?

Regression from ext3.

> 
> What arguments are you giving to this test program of yours?   It looks like it
> does some number of reads and/or writes to the file, and then calls 10,000
> msyncs with 50ms wait between each msync.

While doing those msync()s mmap file is unchanged, but ...

> 
> I'm not seeing any disk activity as a result.   Was anything else reading or
> writing to the file or to the file system at the same time?

... my HDD led keeps flashing continuously which certainly means some disk
activity. Should I attach a video showing this abnormality on kernel 2.6.32.2
on runlevel 1 with no application running except bash and this application?

-- 
Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html