linux-kernel - Re: sysfs_dir_cache growing out of control

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Message-ID: <46CE33DA.9010501@googlemail.com>
Date:	Fri, 24 Aug 2007 03:26:50 +0200
From:	Gabriel C <nix.or.die@...glemail.com>
To:	Greg KH <greg@...ah.com>
CC:	Joel Fuster <j@...ter.org>, linux-kernel@...r.kernel.org
Subject: Re: sysfs_dir_cache growing out of control

Greg KH wrote:
> On Thu, Aug 23, 2007 at 08:44:10PM -0400, Joel Fuster wrote:
>> Greg KH wrote:
>>> On Wed, Aug 22, 2007 at 11:56:44PM -0400, Joel Fuster wrote:
>>>> Joel Fuster wrote:
>>>>> Hi,
>>>>> I am running 2.6.22.3.  For reasons that escape me, over time (days) the 
>>>>> sysfs_dir_cache, dentry, and inode_cache SLUB entries grow until they 
>>>>> consume all the memory on my system, requiring a reboot.
>>> Hm, those items should consume all the memory, but it should be freed if
>>> you have memory pressure from other places.  Does it cause the machine
>>> to lock up, or you just got scared when seeing them?
>> Right.  The problem is that the memory never seems to get freed no matter 
>> what I do.  I've tried setting /proc/sys/vm/vfs_cache_pressure to 10000, 
>> but after a few days all my programs are running out of swap and I have to 
>> reboot to get things back to a usable state.
>>
>>> Oh, and does the same thing happen if you do not use SLUB, but rather
>>> the older SLAB?
>> OK I just rebuilt 2.6.22.3 with SLAB and I seem to be getting the same 
>> result..obviously I haven't waited several days, but 
>> sysfs_dir_cache/dentry/inode_cache grow continuously when scanbuttond is 
>> running, and stop growing when it isn't.
> 
> Do you have a pointer to the scanbuttond source code?  I'll try to take
> a look at this tomorrow.
> 

I guess this one :

https://sourceforge.net/projects/scanbuttond/

> thanks,
> 
> greg k-h
> -


Gabriel
-
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