Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7df620d852642d424afc9777fe57880e02c92832
Commit: 7df620d852642d424afc9777fe57880e02c92832
Parent: 6b9699bbd24e82d2ec3bb5a43100099a936ded04
Author: Ed L. Cashin <[EMAIL PROTECTED]>
AuthorDate: Fri Feb 8 04:20:07 2008 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Feb 8 09:22:32 2008 -0800
aoe: add module parameter for users who need more outstanding I/O
An AoE target provides an estimate of the number of outstanding commands
that
the AoE initiator can send before getting a response. The aoe_maxout
parameter provides a way to set an even lower limit. It will not allow a
user
to use more outstanding commands than the target permits. If a user
discovers
a problem with a large setting, this parameter provides a way for us to work
with them to debug the problem. We expect to improve the dynamic window
sizing algorithm and drop this parameter. For the time being, it is a
debugging aid.
Signed-off-by: Ed L. Cashin <[EMAIL PROTECTED]>
Cc: Greg KH <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/block/aoe/aoecmd.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 7a96183..e92d885 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -18,6 +18,11 @@ static int aoe_deadsecs = 60 * 3;
module_param(aoe_deadsecs, int, 0644);
MODULE_PARM_DESC(aoe_deadsecs, "After aoe_deadsecs seconds, give up and fail
dev.");
+static int aoe_maxout = 16;
+module_param(aoe_maxout, int, 0644);
+MODULE_PARM_DESC(aoe_maxout,
+ "Only aoe_maxout outstanding packets for every MAC on eX.Y.");
+
static struct sk_buff *
new_skb(ulong len)
{
@@ -984,7 +989,6 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
struct aoeif *ifp;
ulong flags, sysminor, aoemajor;
struct sk_buff *sl;
- enum { MAXFRAMES = 16 };
u16 n;
h = (struct aoe_hdr *) skb_mac_header(skb);
@@ -1009,8 +1013,8 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
}
n = be16_to_cpu(ch->bufcnt);
- if (n > MAXFRAMES) /* keep it reasonable */
- n = MAXFRAMES;
+ if (n > aoe_maxout) /* keep it reasonable */
+ n = aoe_maxout;
d = aoedev_by_sysminor_m(sysminor);
if (d == NULL) {
-
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