lkml.org 
[lkml]   [2012]   [Mar]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[ 43/95] [SCSI] osd_uld: Bump MAX_OSD_DEVICES from 64 to 1,048,576
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Boaz Harrosh <bharrosh@panasas.com>

commit 41f8ad76362e7aefe3a03949c43e23102dae6e0b upstream.

It used to be that minors where 8 bit. But now they
are actually 20 bit. So the fix is simplicity itself.

I've tested with 300 devices and all user-mode utils
work just fine. I have also mechanically added 10,000
to the ida (so devices are /dev/osd10000, /dev/osd10001 ...)
and was able to mkfs an exofs filesystem and access osds
from user-mode.

All the open-osd user-mode code uses the same library
to access devices through their symbolic names in
/dev/osdX so I'd say it's pretty safe. (Well tested)

This patch is very important because some of the systems
that will be deploying the 3.2 pnfs-objects code are larger
than 64 OSDs and will stop to work properly when reaching
that number.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/scsi/osd/osd_uld.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/scsi/osd/osd_uld.c
+++ b/drivers/scsi/osd/osd_uld.c
@@ -69,10 +69,10 @@
#ifndef SCSI_OSD_MAJOR
# define SCSI_OSD_MAJOR 260
#endif
-#define SCSI_OSD_MAX_MINOR 64
+#define SCSI_OSD_MAX_MINOR MINORMASK

static const char osd_name[] = "osd";
-static const char *osd_version_string = "open-osd 0.2.0";
+static const char *osd_version_string = "open-osd 0.2.1";

MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>");
MODULE_DESCRIPTION("open-osd Upper-Layer-Driver osd.ko");



\
 
 \ /
  Last update: 2012-03-09 21:23    [W:0.339 / U:0.212 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site