Re: xl driver again? Re: mbuf leakage on 4.1.1-STABLE

[Cy Schubert - ITSD Open Systems Group]

In message <[EMAIL PROTECTED]>, Bill Paul 
writes:
> The xl driver never holds more than 128 mbuf clusters in the receive ring.
> Whenever a new packet comes in, it sends one of the mbufs out and replaces
> it with a new one. IT DOESN'T HOLD ONTO THEM. It will however complain if
> it can't allocate a replacement mbuf. What it will do is allocate them very
> fast, and sometimes mbufs do get held inside the kernel for too long a
> time. It seems to be worse in cases where you have a lot of UDP traffic
> or a large number of open TCP connections. My only suggestion for now
> is to add more mbufs by bumping NMBCLUSTERS.

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)?


Regards,                       Phone:  (250)387-8437
Cy Schubert                      Fax:  (250)387-5766
Team Leader, Sun/DEC Team   Internet:  [EMAIL PROTECTED]
Open Systems Group, ITSD, ISTA
Province of BC





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