[Stgt-devel] Errors in fsck with iSER (was: iSER patches, third release)

[FUJITA Tomonori]

On Mon, 17 Dec 2007 15:17:16 +0200
Erez Zilber <erezz at Voltaire.COM> wrote:

> 
> FUJITA Tomonori wrote:
> > On Mon, 10 Dec 2007 10:03:25 -0500
> > Pete Wyckoff <pw at osc.edu> wrote:
> >
> >   
> >> This is the third major release of support for iSCSI Extensions
> >> for RDMA (iSER) to the existing TGT user space SCSI target.  It
> >> uses OpenFabrics libraries and kernel drivers to act as a SCSI
> >> target over RDMA-capable devices.  The code has been tested
> >> against the existing Linux iSER initiator over InfiniBand cards,
> >> but should be specification compliant and work generally.
> >>
> >> A bit of documentation is included, and a short technical report is
> >> available at http://www.osc.edu/~pw/papers/iser-snapi07.pdf with
> >> slides from a presentation at
> >> http://www.osc.edu/~pw/papers/wyckoff-iser-snapi07-talk.pdf .
> >>
> >> The iSER patches can be downloaded from:
> >>
> >>         git://git.osc.edu/tgt
> >>
> >> or browsed at:
> >>
> >>         http://git.osc.edu/?p=tgt.git;a=summary
> >>
> >> Changes since previous series are as follows.
> >>     
> >
> > I merged all the patches. Now mainline tgt supports iSER. Thanks!
> >
> > I also applied some patches that could break iSER support. iSER
> > people, please test the latest tree.
> >   
> 
> We ran some tests on it. Most of them are ok except for fsck. We ran it
> in the following way:
> 
> seed5:/tmp/regtest # parted -s /dev/sdb mkpart primary 0 8500
> seed5:/tmp/regtest # for ((i=1;i<=1000;i++)) do mkfs -t ext2 -q
> /dev/sdb1; fsck -y -ft ext2 /dev/sdb1; echo iteration $i is done; done
> 
> fsck is ok most of the time, but once in a while it looks like this
> (after ~300 iterations):
> 
> fsck 1.38 (30-Jun-2005)
> e2fsck 1.38 (30-Jun-2005)
> Pass 1: Checking inodes, blocks, and sizes
> Pass 2: Checking directory structure
> Pass 3: Checking directory connectivity
> Pass 4: Checking reference counts
> Pass 5: Checking group summary information
> /dev/sdb1: 11/1038336 files (0.0% non-contiguous), 32599/2075195 blocks
> seed5:/tmp/regtest # mkfs -t ext2 -q /dev/sdb1
> seed5:/tmp/regtest # fsck -y -ft ext2 /dev/sdb1

Sounds like data corruption. Do you see the same problem with IPoIB?