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Date:      Fri, 13 Oct 2000 10:08:36 -0700
From:      Alfred Perlstein <bright@wintelcom.net>
To:        Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>
Cc:        hackers@FreeBSD.ORG
Subject:   Re: xl driver again? Re: mbuf leakage on 4.1.1-STABLE
Message-ID:  <20001013100836.I272@fw.wintelcom.net>
In-Reply-To: <200010131202.e9DC2G413278@cwsys.cwsent.com>; from Cy.Schubert@uumail.gov.bc.ca on Fri, Oct 13, 2000 at 05:01:32AM -0700
References:  <20001012174230.C471737B502@hub.freebsd.org> <200010131202.e9DC2G413278@cwsys.cwsent.com>

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* Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca> [001013 05:03] wrote:
> 
> Is there a reason why the kernel might hold on to mbufs for "too long a 
> time" (I take that to mean longer than it should)?

There are many reasons, one is that you may be sending data that
hasn't been ack'd and might need retransmition.

There may also be a lot of data 'in flight' meaning that one reading
data from the network and the reader is slower than the writer
which keeps mbufs tied down in the socket buffers.

-- 
-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
"I have the heart of a child; I keep it in a jar on my desk."


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