* linux-next: possible bug in 'block: remove the BIO_NULL_MAPPED flag'
@ 2020-09-23 12:52 Marc Hartmayer
2020-09-23 14:54 ` Christoph Hellwig
0 siblings, 1 reply; 2+ messages in thread
From: Marc Hartmayer @ 2020-09-23 12:52 UTC (permalink / raw)
To: Christoph Hellwig, Jens Axboe, Linux Next Mailing List
Cc: Christian Borntraeger, Marc Hartmayer, Kernel Mailing List,
Linux Block Mailing List, Linux SCSI Mailing List
Hi Christoph, Jens,
I found an interesting bug in my KVM guest (tested on s390x). The guest
uses a virtio-scsi disk and the current linux-next kernel. The problem
is that I cannot get the SCSI ID of the attached SCSI disk. Running the
command `lsscsi --scsi_id` in the guest returns:
root@qemus390x:~# lsscsi --scsi_id
[0:0:0:0] disk Linux scsi_debug 0190 /dev/sda -
but the expected result is something like:
root@qemus390x:~# lsscsi --scsi_id
[0:0:0:0] disk Linux scsi_debug 0190 /dev/sda 33333333000002710
Also there is no /dev/disk/by-id/scsi-* path created. I bisected the
problem to...
commit f3256075ba49d80835b601bfbff350a2140b2924 (HEAD, refs/bisect/bad)
Author: Christoph Hellwig <hch@lst.de>
Date: Thu Aug 27 17:37:45 2020 +0200
block: remove the BIO_NULL_MAPPED flag
When I reverted this commit the problem was gone. Any ideas what the
problem is? Thanks in advance.
Best regards,
Marc
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: linux-next: possible bug in 'block: remove the BIO_NULL_MAPPED flag'
2020-09-23 12:52 linux-next: possible bug in 'block: remove the BIO_NULL_MAPPED flag' Marc Hartmayer
@ 2020-09-23 14:54 ` Christoph Hellwig
0 siblings, 0 replies; 2+ messages in thread
From: Christoph Hellwig @ 2020-09-23 14:54 UTC (permalink / raw)
To: Marc Hartmayer
Cc: Christoph Hellwig, Jens Axboe, Linux Next Mailing List,
Christian Borntraeger, Kernel Mailing List,
Linux Block Mailing List, Linux SCSI Mailing List
I've reproduced this on x86 and am looking into the issue now.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-09-23 12:52 linux-next: possible bug in 'block: remove the BIO_NULL_MAPPED flag' Marc Hartmayer
2020-09-23 14:54 ` Christoph Hellwig
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