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hv_snapshot: port Linux patch, increase timeout of vss backup operations

Authored by avg on Nov 11 2019, 1:29 PM.



This is based on a Linux change b357fd3908c1191f2.
This patch increases timeout of the VSS_OP_FREEZE operation to 15 minutes.
I believe, but have not confirmed yet, that this should fix diagnostic
messages that users see:

kernel: (da2:storvsc0:0:0:2): Retrying command (per sense data)
kernel: (da2:storvsc0:0:0:2): WRITE(10). CDB: 2a 00 14 2e 0e 00 00 00 08 00 
kernel: (da2:storvsc0:0:0:2): CAM status: SCSI Status Error
kernel: (da2:storvsc0:0:0:2): SCSI status: Check Condition
kernel: (da2:storvsc0:0:0:2): SCSI sense: UNIT ATTENTION asc:3f,2 (Changed operating definition)

Diff Detail

rS FreeBSD src repository
Lint OK
No Unit Test Coverage
Build Status
Buildable 27441
Build 25679: arc lint + arc unit

Event Timeline

avg created this revision.Nov 11 2019, 1:29 PM
avg abandoned this revision.Feb 3 2020, 12:47 PM

Looks like the proposed change does not improve anything, so time to abandon.