On Thu, 29 Nov 2007 14:03:19 +0100 Jan Kara <jack@xxxxxx> wrote: > Adding relevant people and lists to CC... > > Honza > > ----- Forwarded message from Anders Henke <anders.henke@xxxxxxxx> ----- > > Date: Thu, 29 Nov 2007 13:31:50 +0100 > From: Anders Henke <anders.henke@xxxxxxxx> > To: linux-kernel@xxxxxxxxxxxxxxx > Subject: Re: broken dpt_i2o in 2.6.23 (was: ext2_check_page: bad entry in directory) > User-Agent: Mutt/1.5.13 (2006-08-11) > > 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? Sorry about the bug. Can you try this? diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c index 8258506..1255b26 100644 --- a/drivers/scsi/dpt_i2o.c +++ b/drivers/scsi/dpt_i2o.c @@ -3295,7 +3295,7 @@ static struct scsi_host_template adpt_template = { .this_id = 7, .cmd_per_lun = 1, .use_clustering = ENABLE_CLUSTERING, - .use_sg_chaining = ENABLE_SG_CHAINING, + .use_sg_chaining = DISABLE_SG_CHAINING, }; static s32 adpt_scsi_register(adpt_hba* pHba) - 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