From: Jonathan Nieder <jrnieder@gmail.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [regression] qemu-system-arm: segfault in lsi_do_command
Date: Mon, 16 May 2011 10:30:57 -0500 [thread overview]
Message-ID: <20110516153057.GB24316@elie> (raw)
In-Reply-To: <4DD13EFF.80000@redhat.com>
Kevin Wolf wrote:
> I also reviewed the patch that you mentioned and I can't find anything
> suspicious there. I'm afraid you'll have to bite the bullet and run it
> with some debugging code yourself (if it's really related to that patch,
> you'll want to enable DPRINTF in hw/scsi-disk.c as a first step)
I tried reverting a6d96eb7 (scsi: Move sense handling into the driver,
2010-11-24), 78ced65e (scsi-disk: Implement werror for flushes,
2010-10-25), and 8af7a3a (csi-disk: Complete failed requests in
scsi_disk_emulate_command, 2010-10-25), and the segfault is gone. So
now I also have a nice ARM image to reproduce it more quickly with. :)
Here's what the default DPRINTFs write when it segfaults, for what
it's worth. I'll try playing with this some more.
scsi-disk: Command: lun=0 tag=0x0 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x0 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10001 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10001 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10003 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10003 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10005 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10005 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10007 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10007 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10009 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10009 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x1000b data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x1000b status=0 sense=0
scsi-disk: Command: lun=0 tag=0x1000d data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x1000d status=0 sense=0
scsi-disk: Command: lun=0 tag=0x1000f data=0xa0 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x10 0x00 0x00 0x00
scsi-disk: Read buf_len=16
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x1000f status=0 sense=0
scsi-disk: Command: lun=0 tag=0x200 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x200 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10201 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10201 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10203 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10203 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10205 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10205 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10207 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10207 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10209 data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x10209 status=0 sense=0
scsi-disk: Command: lun=0 tag=0x1020b data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x1020b status=0 sense=0
scsi-disk: Command: lun=0 tag=0x1020d data=0x12 0x00 0x00 0x00 0x24 0x00
scsi-disk: Read buf_len=36
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x1020d status=0 sense=0
scsi-disk: Command: lun=0 tag=0x1020f data=0xa0 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x10 0x00 0x00 0x00
scsi-disk: Read buf_len=16
scsi-disk: Read sector_count=0
scsi-disk: Command complete tag=0x1020f status=0 sense=0
scsi-disk: Command: lun=0 tag=0x10011 data=0x00 0x00 0x00 0x00 0x00 0x00
scsi-disk: Command complete tag=0x10011 status=0 sense=0
next prev parent reply other threads:[~2011-05-16 15:31 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-04 13:15 [Qemu-devel] [PULL 00/10] Block patches Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 01/10] scsi-disk: Implement rerror option Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 02/10] block: Allow bdrv_flush to return errors Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 03/10] scsi-disk: Complete failed requests in scsi_disk_emulate_command Kevin Wolf
2011-05-16 11:23 ` [Qemu-devel] [regression] qemu-system-arm: segfault in lsi_do_command Jonathan Nieder
2011-05-16 15:13 ` Kevin Wolf
2011-05-16 15:30 ` Jonathan Nieder [this message]
2011-05-16 15:43 ` Jonathan Nieder
2011-05-16 15:58 ` Kevin Wolf
2011-05-16 16:26 ` Paolo Bonzini
2011-05-16 18:35 ` Jonathan Nieder
2011-05-17 7:43 ` Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 04/10] scsi-disk: Implement werror for flushes Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 05/10] vpc: Implement bdrv_flush Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 06/10] qcow2: Invalidate cache after failed read Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 07/10] block: avoid a warning on 64 bit hosts with long as int64_t Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 08/10] ide: Handle immediate bdrv_aio_flush failure Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 09/10] virtio-blk: Handle immediate flush failure properly Kevin Wolf
2010-11-04 13:15 ` [Qemu-devel] [PATCH 10/10] scsi-disk: Fix immediate failure of bdrv_aio_* Kevin Wolf
2010-11-04 13:23 ` [Qemu-devel] Re: [PULL 00/10] Block patches Anthony Liguori
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