From: Olaf Hering Date: Thu, 21 Feb 2013 20:04:51 +0000 (-0800) Subject: [SCSI] storvsc: avoid usage of WRITE_SAME X-Git-Tag: v3.9-rc1~21^2~7 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3e8f4f4065901c8dfc51407e1984495e1748c090;p=pandora-kernel.git [SCSI] storvsc: avoid usage of WRITE_SAME Set scsi_device->no_write_same because the host does not support it. Also blacklist WRITE_SAME to avoid (and log) accident usage. If the guest uses the ext4 filesystem, storvsc hangs while it prints these messages in an endless loop: ... [ 161.459523] hv_storvsc vmbus_0_1: cmd 0x41 scsi status 0x2 srb status 0x6 [ 161.462157] sd 2:0:0:0: [sda] [ 161.463135] Sense Key : No Sense [current] [ 161.464983] sd 2:0:0:0: [sda] [ 161.465899] Add. Sense: No additional sense information [ 161.468211] hv_storvsc vmbus_0_1: cmd 0x41 scsi status 0x2 srb status 0x6 [ 161.475766] sd 2:0:0:0: [sda] [ 161.476728] Sense Key : No Sense [current] [ 161.478284] sd 2:0:0:0: [sda] [ 161.479441] Add. Sense: No additional sense information ... This happens with a guest running on Windows Server 2012, but happens to work while running on Windows Server 2008. WRITE_SAME isnt really supported by both versions, so disable the command usage globally. Signed-off-by: Olaf Hering Signed-off-by: K. Y. Srinivasan Signed-off-by: James Bottomley --- Reading git-diff-tree failed