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From: Helge Hafting <helge.hafting@hist.no>
To: Olaf Hering <olh@suse.de>
Cc: DervishD <lkml@dervishd.net>,
	Andries.Brouwer@cwi.nl, linux-kernel@vger.kernel.org
Subject: Re: OOM & [OT] util-linux-2.12e
Date: Mon, 20 Sep 2004 15:32:59 +0200	[thread overview]
Message-ID: <414EDC0B.3030108@hist.no> (raw)
In-Reply-To: <20040920132151.GA30175@suse.de>

Olaf Hering wrote:

> On Mon, Sep 20, Helge Hafting wrote:
>
>  
>
>>Using a mtab that is a link to /proc/mounts fails with quota too.
>>Quta tools read /etc/mtab looking for "usrquota" and or "grpquota"
>>mount options.  These appear in a normal /etc/mtab but not in /proc/mounts,
>>    
>>
>
>I have never played with quota. But: does the kernel or a userland tool
>if quota is active for a mount point? smells like a kernel bug.
>  
>
The kernel must know that quota is in use, or it'd be unable to
refuse the syscalls when someone tries to go over his quota.

 From "man mount":
       grpquota / noquota / quota / usrquota
              These  options are accepted but ignored.  (However, quota 
utili‐
              ties may react to such strings in /etc/fstab.)

quota utilities indeed react to such strings in /etc/mtab too.

Qutas aren't actually enabled when the mount options are used,
they are enabled when the "quotaon" tool runs.  I guess it uses
some special syscall or ioctl to really turn quota on.

Doing it at mount time instead, byt actually using those options,
seems saner to me.  But I guess they had their reasons. . .

Helge Hafting



  reply	other threads:[~2004-09-20 13:28 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-09-19 22:05 OOM & [OT] util-linux-2.12e Andries.Brouwer
2004-09-20  9:46 ` Olaf Hering
2004-09-20 10:12   ` Andreas Schwab
2004-09-20 10:54     ` DervishD
2004-09-20 11:43       ` Andreas Schwab
2004-09-20 11:51         ` Paulo Marques
2004-09-20 12:11           ` DervishD
2004-09-20 12:14           ` Andreas Schwab
2004-09-20 12:00         ` DervishD
2004-09-20 10:23   ` Roman Zippel
2004-09-20 10:56     ` Olaf Hering
2004-09-20 11:16       ` Roman Zippel
2004-09-20 11:26         ` Olaf Hering
2004-09-20 11:38           ` Roman Zippel
2004-09-20 11:50             ` Olaf Hering
2004-09-20 12:02               ` Roman Zippel
2004-09-20 12:07                 ` Olaf Hering
2004-09-20 12:14                   ` Roman Zippel
2004-09-20 12:19                     ` Olaf Hering
2004-09-20 12:34                       ` Roman Zippel
2004-09-20 12:38                         ` Olaf Hering
2004-09-20 12:51                           ` Andreas Schwab
2004-09-20 12:54                             ` Olaf Hering
2004-09-20 13:19             ` CaT
2004-09-20 13:33               ` Andreas Schwab
2004-09-20 13:15     ` CaT
2004-09-20 10:59   ` DervishD
2004-09-20 13:24     ` Helge Hafting
2004-09-20 13:21       ` Olaf Hering
2004-09-20 13:32         ` Helge Hafting [this message]
2004-09-20 14:12           ` Herbert Poetzl
2004-09-21  7:20             ` Helge Hafting
2004-09-21  9:18               ` Herbert Poetzl
2004-09-20 15:24     ` Tonnerre
2004-09-20 11:11   ` David Gómez
2004-09-20 11:06 ` DervishD
2004-09-20 11:38   ` Xavier Bestel
2004-09-20 11:59     ` DervishD
2004-09-20 12:32       ` Xavier Bestel
2004-09-20 14:16         ` Herbert Poetzl
2004-09-21 16:45 ` Jari Ruusu
2004-09-21 21:26   ` Andries Brouwer
2004-09-22 17:05     ` Jari Ruusu
2004-09-22 18:39       ` Andries Brouwer

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