linux-kernel - Re: absurdly high "optimal_io

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Date:	Thu, 06 Nov 2014 12:34:14 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Chris Friesen <chris.friesen@...driver.com>
Cc:	Jens Axboe <axboe@...nel.dk>, lkml <linux-kernel@...r.kernel.org>,
	<linux-scsi@...r.kernel.org>, Mike Snitzer <snitzer@...hat.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Subject: Re: absurdly high "optimal_io_size" on Seagate SAS disk

>>>>> "Chris" == Chris Friesen <chris.friesen@...driver.com> writes:

Chris> Perhaps the ST900MM0026 should be blacklisted as well?

Sure. I'll widen the net a bit for that Seagate model.

commit 17f1ee2d16a6878269c4429306f6e678b7e61505
Author: Martin K. Petersen <martin.petersen@...cle.com>
Date:   Thu Nov 6 12:31:43 2014 -0500

    SCSI: Blacklist ST900MM0026
    
    Looks like this entire series of drives reports the wrong values in the
    block limits VPD. Widen the blacklist.
    
    Reported-by: Chris Friesen <chris.friesen@...driver.com>
    Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>

diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
index 49014a143c6a..9116531b415a 100644
--- a/drivers/scsi/scsi_devinfo.c
+++ b/drivers/scsi/scsi_devinfo.c
@@ -229,7 +229,7 @@ static struct {
 	{"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
 	{"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},	/* Chokes on tagged INQUIRY */
 	{"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
-	{"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
+	{"SEAGATE", "ST900MM", NULL, BLIST_SKIP_VPD_PAGES},
 	{"SGI", "RAID3", "*", BLIST_SPARSELUN},
 	{"SGI", "RAID5", "*", BLIST_SPARSELUN},
 	{"SGI", "TP9100", "*", BLIST_REPORTLUN2},
--
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