On Friday 28 September 2007 18:42, Krzysztof Oledzki wrote:
> Hello,
>
> I am experiencing weird system hangs. Once about 2-5 weeks system freezes
> and stops accepting remote connections, so it is no longer possible to
> connect to most important services: smtp (postfix), www (squid) or even
> ssh. Such connection is accepted but then it hangs.
>
> What is strange, that previously established ssh session is usable. It is
> possible to work on such system until you do something stupid like "less
> /var/log/all.log". Using strace I found that process blocks on:
Is this a regression? If so, what's the most recent kernel that didn't show
the problem?
The symptoms could be consistent with some place doing a
balance_dirty_pages while holding a lock that is required for IO, but I can't
see a smoking gun (you've got contention on i_mutex, but that should be
OK).
Can you see if there is any memory under writeback that isn't being
completed (sysrq+M), also a list the locks held after the hang might be
helpful (compile in lockdep and sysrq+D)
Is anything currently running? (sysrq+P and even a full sysrq+T task list
could be useful).
Are any IO errors occurring at all?
Thanks,
Nick
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
