/usr/src/kernel-patches/lustre/patches/blkdev_tunables-2.6-sles10.patch is in linux-patch-lustre 1.8.5+dfsg-3ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | Index: linux-2.6.16.54-0.2.3/include/scsi/scsi_host.h
===================================================================
--- linux-2.6.16.54-0.2.3.orig/include/scsi/scsi_host.h
+++ linux-2.6.16.54-0.2.3/include/scsi/scsi_host.h
@@ -28,7 +28,7 @@ struct scsi_transport_template;
* used in one scatter-gather request.
*/
#define SG_NONE 0
-#define SG_ALL 0xff
+#define SG_ALL 256
#define DISABLE_CLUSTERING 0
Index: linux-2.6.16.54-0.2.3/drivers/scsi/scsi_lib.c
===================================================================
--- linux-2.6.16.54-0.2.3.orig/drivers/scsi/scsi_lib.c
+++ linux-2.6.16.54-0.2.3/drivers/scsi/scsi_lib.c
@@ -1573,6 +1573,7 @@ struct request_queue *scsi_alloc_queue(s
blk_queue_prep_rq(q, scsi_prep_fn);
+ blk_queue_max_phys_segments(q, SCSI_MAX_PHYS_SEGMENTS);
blk_queue_max_hw_segments(q, shost->sg_tablesize);
blk_queue_max_sectors(q, shost->max_sectors);
blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost));
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