Re: lot of VM problem with 2.4.23

[Marcelo Tosatti]

On Sun, 21 Dec 2003, Octave wrote:

> > one of my collegues had a server which occasionally crashed at night with
> > mysql taking all the memory. I think it was with an old 2.4.18 kernel. He
> > finally reinstalled all the machine and it never happened anymore. So
> > eventhough it works for you with 2.4.22, perhaps 2.4.23 triggers a mysql
> > bug which is fixed in more recent releases ?
>
> Willy,
> Hmm ... could be, but I don't think so. I use last mysql3 version and
> I have this problem without mysql too.
>
> For example on this box there is no mysql (Piv 2.4GHz/512Mo):
> __alloc_pages: 0-order allocation failed (gfp=0x1d2/0)
> VM: killing process watchdog
> __alloc_pages: 1-order allocation failed (gfp=0x1f0/0)
> __alloc_pages: 0-order allocation failed (gfp=0x1d2/0)
> VM: killing process watchdog
>
> # free
>              total       used       free     shared    buffers     cached
> Mem:        514468     508416       6052          0      11608     205464
> -/+ buffers/cache:     291344     223124
> Swap:       265032      77524     187508
>
> When I swithed more that 700 servers 10-15 days ago to 2.4.23, I saw that
> servers swaped less that with 2.4.22. So I believe VM was modified. Cool.
> Great job. Now servers begin to crash :/

Octave,

Can you please "echo 1 > /proc/sys/vm_gfp_debug" (to turn VM debugging on)
and rerun the tests which crash the box.

Also run "vmstat 5" in the background and save that to a file.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/