Re: 2.6.38.1: CPU#0 stuck for 67s! / xfs_ail_splice

Justin Piszcz
2011-03-28T08:10:15Z

On Mon, 28 Mar 2011, Dave Chinner wrote:

> On Sat, Mar 26, 2011 at 09:29:36AM -0400, Justin Piszcz wrote:
>> Hi,
>>
>> When I rm -rf a directory of a few hundred thousand
>> files/directories on XFS under 2.6.38.1, I see the following, is
>> this normal?
>
> No. What is you filesystem config (xfs_info) and your mount options?
> Is it repeatable? I? the system otherwise stalled or is it still
> operating normally? Does it recover and work normally after such a
> stall?

Hi Dave, default mkfs.xfs options:

> What is you filesystem config (xfs_info) and your mount options?

# xfs_info /dev/sda1
meta-data=/dev/sda1 isize=256 agcount=44, agsize=268435455 blks
= sectsz=512 attr=2
data = bsize=4096 blocks=11718704640, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal bsize=4096 blocks=521728, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0

/dev/sda1 on /r1 type xfs (rw,noatime,nobarrier,logbufs=8,logbsize=262144,delaylog,inode64)

> Is it repeatable?
I've not tried to repeat it as is spews messages over all of my consoles but
it has happened more than once.

> the system otherwise stalled or is it still operating normally?
The console/xterm/ssh etc that is performing the removal does lockup but
you are able to access the machine via a separate ssh connection.

> Does it recover and work normally after such a stall?
Yes, eventually, I believe I started seeing this problem when I added
'delaylog' option to the mount options..

Justin.