Re: 2.6.19-mm1

From: KAMEZAWA Hiroyuki
Date: Tue Dec 12 2006 - 01:40:37 EST


On Mon, 11 Dec 2006 22:06:17 -0800
Andrew Morton <akpm@xxxxxxxx> wrote:
> > When I use ftp on 2.6.19-mm1, transfered file is always broken.
> > like this:
> > ==
> > [kamezawa@casares ~]$ file ./linux-2.6.19.tar.bz2 (got on 2.6.19-mm1)
> > ./linux-2.6.19.tar.bz2: data
> > (I confirmed original file was not broken.)
>
> Yes, a couple of people have reported things like this. Strange.
> test.kernel.org is showing mostly-green. There's one fsx-linux failure (for
> unclear reasons) on one of the x86_64 machines, all the rest are happy.
>
> Which filesystem were you using?
>
using ext3.
> Can you investigate it a bit further please?? reboot, re-download, work
> out how the data differs, etc?
>
Hmm, this is summary of broken linux-2.6.19.tar.bz2 file (used od and diff)

offset 000000 -> 000b4f zero cleared.
offset 000b50 -> 000fff not broken
offset 001000 -> 001c47 zero cleared
offset 001c48 -> 001fff not broken
offset 002000 -> 002d39 zero cleared
offset 002d40 -> 003fff not broken.
offset 004000 -> 004f2f zero cleared
offset 004f30 -> 004fff not broken
offset 005000 -> 005a79 zero cleared
offset 005a80 -> 005fff not broken
offset 006000 -> 006b7f zero cleared
offset 006b80 -> 007fff not broken
.......

All broken parts are always zero-cleared and start from offset
aligned to 0x1000. (note: broken kernel's PAGE_SIZE is 16384)

I'll do AMAP.

-Kame









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