Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b6d44fe9582b9d90a0b16f508ac08a90d899bf56
Commit: b6d44fe9582b9d90a0b16f508ac08a90d899bf56
Parent: e07264071f7f2b02a2973cb28d9fdf5eb8866cc1
Author: Mike Christie <[EMAIL PROTECTED]>
AuthorDate: Thu Jul 26 12:46:47 2007 -0500
Committer: James Bottomley <[EMAIL PROTECTED]>
CommitDate: Fri Jul 27 09:12:54 2007 -0400
[SCSI] iscsi_tcp: Turn off bounce buffers
It was found by LSI that on setups with large amounts of memory
we were bouncing buffers when we did not need to. If the iscsi tcp
code touches the data buffer (or a helper does),
it will kmap the buffer. iscsi_tcp also does not interact with hardware,
so it does not have any hw dma restrictions. This patch sets the bounce
buffer settings for our device queue so buffers should not be bounced
because of a driver limit.
Signed-off-by: Mike Christie <[EMAIL PROTECTED]>
Signed-off-by: James Bottomley <[EMAIL PROTECTED]>
---
drivers/scsi/iscsi_tcp.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 93034b4..a21455d 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -2216,6 +2216,7 @@ static void iscsi_tcp_session_destroy(struct
iscsi_cls_session *cls_session)
static int iscsi_tcp_slave_configure(struct scsi_device *sdev)
{
+ blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_ANY);
blk_queue_dma_alignment(sdev->request_queue, 0);
return 0;
}
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