linux-kernel - Re: GFS2 file locking issues

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:	Wed, 11 Feb 2009 20:57:12 +0300
From:	Kirill Kuvaldin <kirill.kuvaldin@...il.com>
To:	steve@...gwyn.com
Cc:	linux-cluster@...hat.com, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: GFS2 file locking issues

On Wed, Feb 11, 2009 at 8:18 PM,  <steve@...gwyn.com> wrote:
> cat /proc/mounts

/dev/mapper/gfsc-lvol0 /gfs2 gfs2 rw,hostdata=jid=0:id=720897:first=1 0 0

I also tried mounting explicitly specifying lockproto=lock_dlm, but it
didn't help.

Is my understanding of locking correct after all? Is that the case if
the process makes flock on a file, no other processes including ones
running on other cluster nodes could obtain a lock until the first
writer releases it?

>
> It should be listed in the options. That will also tell you if localflocks
> has been set as well. We do know of a bug in the GFS/GFS2 flock code though,
> it ought to be using an interruptible wait and it doesn't at the moment.
> Otherwise I don't know of any other issues.
>
> Which kernel version are you using?

2.6.18-92.el5xen (from CentOS 5.2)


Kirill
--
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/