Hello Oleg,
On Thu, 2007-05-17 at 22:45 +0400, Oleg Nesterov wrote:
> Hello Zilvinas,
>
> On 05/17, Zilvinas Valinskas wrote:
> >
> > Patch seems to help and it seems kernel doesn't free anymore. I've
> > booted new kernel and did :
>
> OK, thank you very much. So, we have some other problems, and I _think_
> that workqueue.c is not the source of them.
You are welcome. I wish I could determine and fix the problem myself. I
will try to help, debug the problem as long as there is any progress or
ideas to try out.
> However, I can't understand why cleanup_workqueue_thread() hangs anyway.
> It shouldn't. Looks like rpciod/1 was preempted, and can't get CPU. According
> to kernel-nfs-freeze.log it is TASK_RUNNING. Strange.
>
> It is very sad, because this code was supposed to be cleanuped anyway,
> but if it is really buggy, it would be great to know why.
Can this be related to :
CONFIG_PREEMPT=y
# CONFIG_PREEMPT_BKL is not set
> Perhaps, we can understand the problem with your help. Could you please
> revert the patch I sent, and send me (privately) the output of
>
> objdump -d kernel/workqueue.o
I have uploaded files at http://barclay.balt.net/~zilvinas/oops/
workqueue.objdump - without any patch.
workqueue+oleg-old.objdump - with older patch Oleg sent on Thu, 17 May.
workqueue+oleg-new.objdump - with the newest patch from Oleg applied.
For what it's worth, I am using Debian/Unstable
$ gcc -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --enable-languages=c,c
++,fortran,objc,obj-c++,treelang --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls
--with-gxx-include-dir=/usr/include/c++/4.1.3 --program-suffix=-4.1
--enable-__cxa_atexit --enable-clocale=gnu --enable-libstdcxx-debug
--enable-mpfr --enable-checking=release x86_64-linux-gnu
Thread model: posix
gcc version 4.1.3 20070514 (prerelease) (Debian 4.1.2-7)
$ ld -V
GNU ld (GNU Binutils for Debian) 2.17.50.20070426
Supported emulations:
elf_x86_64
elf_i386
i386linux
> ? I doubt very much I'll see something interesting, but who knows...
>
> Thanks!
>
> Oleg.
>
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