Re: Kernel 2.6.6 & 2.6.7 sometime hang after much I/O

[Matthias Schniedermeyer <ms@citd.de>]

[-- Attachment #1: Type: text/plain, Size: 2173 bytes --]

On Sun, Jun 20, 2004 at 08:29:20PM +1000, Nick Piggin wrote:
> Matthias Schniedermeyer wrote:
> >
> >
> >First. Kernels <= 2.6.5 don't have this problem. After 2.6.6 show this
> >behaviour sometimes i downgraded to 2.6.5 as i thought that it would be
> >fixed in 2.6.7, but 2.6.7 also show this behaviour.
> >
> >The I/O i do is split some large files (>2GB) into smaller files <= 2GB.
> >Sometimes the process that does this just hangs (currently i have such a
> >hangung process), top currently shows up to 90% I/O-Wait.
> >
> >SOME of my "konsole"s(xterm) hang then too, but others don't (like this
> >where i type this email) starting new "konsole"s sometimes work, sometimes
> >not.
> >
> >System is:
> >Distribution: Debian SID.
> >2xP3-933Mhz, 3GB-RAM, Serverworks HE-SL-Chipset
> >"System"-HDD is SCSI connected via Symbios-53c1010 (Dual U160)
> >"Data"-HDD(s)(where the split-process does it's work) is connected to a
> >Highpoint RocketRAID 1540 (HPT-374 Chipset)
> >Filesystem is XFS for the Data-HDD(s) and Reiserfs for the system-HDD.
> >
> >If other info is needed i will provide them.
> >
> 
> When the process has hung, press Alt + SysRq + T to get a task
> trace. Run
> 
> 	dmesg -s 1000000 > tmp
> 
> and send us tmp. You'd better send your .config and dmesg too.

Here we go.

Addendum: After some time more and more konsole froze. Up to the point
where i (had to) kill(ed) X(CTRL-ALT-Backspace) and after i couldn't
even log in at the console anymore i rebooted (into 2.6.5). Then i
recompiled 2.6.7 with SYSRQ-support and tried to reproduce the hanging
without X. After 3 runs i "gave up" and started X. Here i had luck and
the process ('cut-movie.pl') froze at first try. Then i killed X and did
the above on the console.

As the system is currently unsuable enough to reboot, i will reboot in
2.6.5 after this mail, but i can always reboot into 2.6.7 if you need
more input.




Bis denn

-- 
Real Programmers consider "what you see is what you get" to be just as 
bad a concept in Text Editors as it is in women. No, the Real Programmer
wants a "you asked for it, you got it" text editor -- complicated, 
cryptic, powerful, unforgiving, dangerous.


[-- Attachment #2: config.gz --]
[-- Type: application/x-gunzip, Size: 6192 bytes --]

[-- Attachment #3: dmesg.gz --]
[-- Type: application/x-gunzip, Size: 6038 bytes --]