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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