[PATCH 1/1 net-next] ipv4: add kernel parameter tcpmhash_entries

[PATCH 1/1 net-next] ipv4: add kernel parameter tcpmhash_entries

[Fabian Frederick]

Signed-off-by: Fabian Frederick <fabf@skynet.be>
---
 Documentation/kernel-parameters.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 4c81a86..5f37111 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -3412,6 +3412,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			neutralize any effect of /proc/sys/kernel/sysrq.
 			Useful for debugging.
 
+	tcpmhash_entries=  [KNL,NET]
+			Set tcp_metrics_hash slot number.
+			Default value is 8192 or 16384 depending on total
+			ram pages.
+
 	tdfx=		[HW,DRM]
 
 	test_suspend=	[SUSPEND][,N]
-- 
1.9.3

Re: [PATCH 1/1 net-next] ipv4: add kernel parameter tcpmhash_entries

[Jonathan Corbet]

On Tue,  4 Nov 2014 20:23:08 +0100
Fabian Frederick <fabf@skynet.be> wrote:

> +			Set tcp_metrics_hash slot number.

So I'm not entirely clear on what that means.  Did you mean "Set the
number of tcp_metrics_hash slots"?  If so, that wording should be used.

Even in that case, though, what does this parameter actually *mean*?  If
we're going to document the parameter (and I think we should), it would
be good to say why a user might want to change it and what effects they
would expect to see.

Care to redo with that in mind?

Thanks,

jon