[Linux-cachefs] Possible patch for CacheFiles: I/O Error: Unlink failed

[Greg M]

Success! The bug that had been plaguing me for month is now fixed, however
the load seems to be unusually high:

top - 11:16:31 up 52 min,  2 users,  load average: 6.85, 3.83, 2.29
Tasks:  96 total,   4 running,  92 sleeping,   0 stopped,   0 zombie
Cpu0  :  0.9%us,  3.5%sy,  0.0%ni, 10.0%id, 81.7%wa,  1.3%hi,  2.6%si,
0.0%st
Cpu1  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,
0.0%st
Cpu2  :  1.7%us,  1.3%sy,  0.0%ni, 95.7%id,  1.3%wa,  0.0%hi,  0.0%si,
0.0%st
Cpu3  :  0.0%us, 34.9%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi, 65.1%si,
0.0%st
Mem:   4057892k total,  2616856k used,  1441036k free,  1087752k buffers
Swap:  2104504k total,        0k used,  2104504k free,  1112304k cached

>From what I can tell, this is due to massive writes on the disk

Atop:

DSK |           sdb  |  busy    188%  |  read       0  |   write    353  |
MBw/s   1.32  |  avio 6.06 ms  |
NET |  eth0      2%  |  pcki    6058  |  pcko    7562  |   si 8954 Kbps  |
so   25 Mbps  |  erro       0  |

Hopefully it will settle down.

Also - Is it possible to use a RAMdisk for /var/fscache?

This would obviously provide 4GB of super fast caching .

Greg

-----Original Message-----
From: linux-cachefs-bounces at redhat.com
[mailto:linux-cachefs-bounces at redhat.com] On Behalf Of David Howells
Sent: Thursday, 1 April 2010 10:05 PM
To: Greg M
Cc: 'Linux filesystem caching discussion list'
Subject: Re: [Linux-cachefs] Possible patch for CacheFiles: I/O Error:
Unlink failed

Greg M <gregm at servu.net.au> wrote:

> I've extracted the below code but get the following error after 
> applying to
> 2.6.33(0)

I'm using 2.6.34-rc3.  Does using that help?

> (Noting patches 1-5 are the patches you've put in the list in the last 
> 2 weeks).

What do you mean by that?

David

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