[Lustre-discuss] Lustre 1.8.0.50 + Xen + kernel 2.6.22.17

[Lukas Hejtmanek]

On Mon, Apr 20, 2009 at 02:42:40PM -0600, Andreas Dilger wrote:
> > The core looks like this:
> > #1  0x00002b7d5ff825a2 in DumpModeDecode (tif=0x58cdd0, buf=0xf7f7f7f5f5f5f6f6
> > <Address 0xf7f7f7f5f5f5f6f6 out of bounds>, cc=76800, s=2016)
> >     at tif_dumpmode.c:85
> 
> This looks like the buffer being passed to the kernel is not aligned
> properly.   The message is fairly clear:
> 
> 	buf=0xf7f7f7f5f5f5f6f6
> 	<Address 0xf7f7f7f5f5f5f6f6 out of bounds>
> 
> For mmap IO this should be aligned to a PAGE_SIZE boundary, normally
> a multiple of 4096 bytes.

that is misunderstanding.

the buffer had the valid value buf=0x5923a0 but it was asynchronously modified
by someone to the value buf=0xf7f7f7f5f5f5f6f6.

so, what I see, there happens some memory corruption if using mmap with lustre.

-- 
Lukáš Hejtmánek