Re: [Regression] fstrim hangs on Hyper-V: caused by "block: improve handling of the magic discard payload"
From: Christoph Hellwig <hch@lst.de>
Date: 2017-01-12 15:53:36
Also in:
lkml
Subsystem:
hyper-v/azure core and drivers, scsi subsystem, the rest · Maintainers:
"K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, "James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
Possibly related (same subject, not in this thread)
- 2017-01-13 · Re: [Regression] fstrim hangs on Hyper-V: caused by "block: improve handling of the magic discard payload" · Christoph Hellwig <hch@lst.de>
- 2017-01-12 · Re: [Regression] fstrim hangs on Hyper-V: caused by "block: improve handling of the magic discard payload" · Christoph Hellwig <hch@lst.de>
- 2017-01-12 · Re: [Regression] fstrim hangs on Hyper-V: caused by "block: improve handling of the magic discard payload" · Christoph Hellwig <hch@lst.de>
Can you check if this debug printk triggers for the discard commands? ---
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 888e16e..7ab7d08 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c@@ -1031,6 +1031,10 @@ static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request, data_transfer_length = 0; } + if (cmd_request->payload->range.len != data_transfer_length) + printk_ratelimited("request len: %u, transfer len: %u\n", + cmd_request->payload->range.len, + data_transfer_length); scsi_set_resid(scmnd, cmd_request->payload->range.len - data_transfer_length);