The patch titled
aoe: add module parameter for users who need more outstanding I/O
has been added to the -mm tree. Its filename is
aoe-add-module-parameter-for-users-who-need-more-outstanding-i-o.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: aoe: add module parameter for users who need more outstanding I/O
From: "Ed L. Cashin" <ecashin@xxxxxxxxxx>
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 <ecashin@xxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/aoe/aoecmd.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff -puN drivers/block/aoe/aoecmd.c~aoe-add-module-parameter-for-users-who-need-more-outstanding-i-o drivers/block/aoe/aoecmd.c
--- a/drivers/block/aoe/aoecmd.c~aoe-add-module-parameter-for-users-who-need-more-outstanding-i-o
+++ a/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) {
_
Patches currently in -mm which might be from ecashin@xxxxxxxxxx are
aoe-bring-driver-version-number-to-47.patch
aoe-handle-multiple-network-paths-to-aoe-device.patch
aoe-mac_addr-avoid-64-bit-arch-compiler-warnings.patch
aoe-clean-up-udev-configuration-example.patch
aoe-eliminate-goto-and-improve-readability.patch
aoe-user-can-ask-driver-to-forget-previously-detected-devices.patch
aoe-dynamically-allocate-a-capped-number-of-skbs-when-necessary.patch
aoe-only-install-new-aoe-device-once.patch
aoe-add-module-parameter-for-users-who-need-more-outstanding-i-o.patch
aoe-the-aoeminor-doesnt-need-a-long-format.patch
aoe-make-error-messages-more-specific.patch
aoe-update-copyright-date.patch
aoe-statically-initialise-devlist_lock.patch
-
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