On Mon, 21 Nov 2011 08:04:30 +0100 James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote: > On Mon, 2011-11-21 at 12:37 +1100, NeilBrown wrote: > > Thank for the report. > > However as this crash is clearly in the SCSI layer it makes sense to reported > > it to linux-scsi - so I have cc:ed this reply there. > > > > NeilBrown > > > > > > On Sat, 19 Nov 2011 14:41:39 +0100 Michał Mirosław <mirq-linux@xxxxxxxxxxxx> > > wrote: > > > > > I get following BUG_ON tripped while booting, before rootfs is mounted by > > > Debian's initrd. This started to happen for kernels since sometime > > > during 3.1-rcX. > > > > > > [ 6.246170] ------------[ cut here ]------------ > > > [ 6.246246] kernel BUG at /mnt/src-tmp/jaja/git/qmqm/drivers/scsi/scsi_lib.c:1153! > > I can tell you what it is: > > /* > * Filesystem requests must transfer data. > */ > BUG_ON(!req->nr_phys_segments); > > But the fault is in the layer above SCSI. It means something sent a > request with REQ_TYPE_FS but no actual data attached ... this is > supposed to be impossible, hence the bug on. > > James > Thanks.... that sounds strangely familiar, but I cannot be sure and google doesn't help. Michał: what are you using on the RAID1 - some filesystem (which one)or swap or something else? NeilBrown
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