> From: Christoph Hellwig [mailto:h...@lst.de]
> Sent: Thursday, January 12, 2017 21:44
> To: Dexuan Cui <de...@microsoft.com>
> Cc: Christoph Hellwig <h...@lst.de>; linux-block@vger.kernel.org; Jens Axboe
> <ax...@fb.com>; Vitaly Kuznetsov <vkuzn...@redhat.com>; linux-
> ker...@vger.kernel.org; KY Srinivasan <k...@microsoft.com>; Chris Valean
> (Cloudbase Solutions SRL) <v-chv...@microsoft.com>
> Subject: Re: [Regression] fstrim hangs on Hyper-V: caused by "block: improve
> handling of the magic discard payload"
>
> Hi Dexuan,
>
> sorry for dropping the ball on the previous private report, I hoped
> I could get my hands on a Hyper-V VM and reproduce it myself, but
> that has obviously not happened.
>
> Can you send me the output of the provisioning_mode file for the
> scsi disk in question to get started?
Hi Christoph,
Thank you very much for the help!
The file just shows "unmap":
root@decui-u1604:~# cd /sys/class/scsi_disk/2\:0\:0\:0
root@decui-u1604:/sys/class/scsi_disk/2:0:0:0# ls
allow_restart cache_type device manage_start_stop
max_write_same_blocks protection_mode provisioning_mode thin_provisioning
app_tag_own deferred_probe FUA max_medium_access_timeouts power
protection_type subsystem uevent
root@decui-u1604:/sys/class/scsi_disk/2:0:0:0# cat provisioning_mode
unmap
I'm ready to provide any info you need. :-)
Thanks,
-- Dexuan
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