Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thursday 11 November 2004 11:22, Cyril Bouthors wrote:
> On 11 Nov 2004, cyril at bouthors.org wrote:
> > The machine stop responding to ICMP requests after ~20 seconds; the
> > same runs just fine if I use an UP kernel.
>
> I've just seen that the kernel said that during the last "make -j"
> crash on the SMP kernel:
>
> Nov 11 10:49:26 filer2 kernel: sh: page allocation failure. order:0,
> mode:0x50 Nov 11 10:49:26 filer2 kernel: [__alloc_pages+450/880]
[...]
>
> I'm not a kernel hacker but it looks like an XFS problem :)
>
> Please let me know if it has nothing to do with DRBD.
I would put it that way:
1st, it is an XFS bug. Because XFS does not handle the failure of
a memory allocation at in a specific situation.
-> A serious filesystem has to deal with such situations
more gracefully.
2nd, DRBD makes the situation not better, since it causes network
load during high disk-IO situations, but well, that is the
purpose of DRBD, it is not a bug.
It is interesting that XFS survives the same memory pressure in an
UP kernel, I guess it is a realy subtile bug in XFS...
-philipp
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