On Tue, 4 Dec 2007 16:57:38 -0800 Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > On Thu, 29 Nov 2007 13:31:50 +0100 > Anders Henke <anders.henke@xxxxxxxx> wrote: > > > On November 28 2007, Anders Henke wrote: > > > As "everything is reported as being zero" is quite odd an Jan took a > > > guess that it might be block-layer or driver-related, I've assumed > > > that the driver is responsible for this; just out of the curiousity, > > > I've manually replaced the dpt_i2o driver by the 2.6.19 one by copying > > > driver/scsi/dpt_i2o.c driver/scsi/dpti.h and driver/scsi/dpt/ into a > > > vanilla 2.6.23.1. kernel; using this kernel fixed the issue for me. > > > > > > I haven't yet fine-tested from which kernel release on the dpt_i2o driver > > > behaves like this and spews out zeroed blocks when trying to mount > > > the rootfs. Maybe this is just some timing issue. > > > > I've started the fine-tests and can say so far that dpt_i2o from > > 2.6.22 is still fine. Test is simple: > > > > anders@ista:/usr/src/linux-2.6.22/drivers/scsi/dpt$ cp -r dpt/ dpt_i2o.c dpti.h /usr/src/linux-2.6.23.1/drivers/scsi/ > > > > ... recompile the kernel, reboot: works. > > > > 2.6.22 and 2.6.23 differ in terms of the dpt_i2o driver by two different > > patch sets: > > -one 2 Kb small set of patches from 2.6.22 to 2.6.22-rc1 > > -one 7 Kb set of patches from 2.6.23-rc2 to 2.6.23-rc3 > > -one 162 Kb set of patches from 2.6.23-rc9 to 2.6.23-rc10. > > > > When applying the 2.6.23-rc1-based driver to "my" 2.6.31.1 kernel, > > the "zero blocks"-symptom show up, so it's the "lucky" situation > > that the smallest patch actually seams to be the broken one. > > > > According to the 2.6.23-rc1 short-form changelog, there is > > one major edit on the dpt_i2o driver: > > > > FUJITA Tomonori > > > > [SCSI] dpt_i2o: convert to use the data buffer accessors > > > > Stephen Rothwell > > dpt_i2o depends on virt_to_bus > > > > Fujita, would you please take a look at this? > > He won't have seen this. cc's added. > > > I think that something's broken in there, leading to the dpt_i2o > > sending out blocks of zeroes right after initialization, at least on > > some specific controllers (in this case, Adaptec 2010S on Intel > > SE7501WV2S-based boxes). > > > > I don't have insight kernel driver development knowledge, so I'm > > quite out of help right now. Nevertheless, I'll add the diff > > from 2.6.22 to 2.6.23-rc1 in terms of dpt_i2o: > > > > Can you please confirm that this revert (against 2.6.24-rc4) fixes the data > corruption problems? Anders said that my patch is fine and seems that Matthew's hotplug conversion patch leads to the problem: http://marc.info/?l=linux-kernel&m=119641892129732&w=2 - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
