Re: [PATCH] PACKET_MMAP limit removal

From: David S. Miller
Date: Sun Mar 28 2004 - 04:52:25 EST

On Sat, 27 Mar 2004 19:42:00 +0100
uaca@xxxxxxxxxxxx wrote:

> This patch also it removes the current limit on the number of frames
> PACKET_MMAP can hold. Currently the buffer can hold only
> 0.15 seconds at a 1 Gb/s in a 32 bit architecture, half
> this amount in a 64 bit machine.
> With this patch, PACKET_MMAP requires __less memory__
> to hold the buffer.
> I have rearranged the most used members of struct packet_opt so they
> fit in a single cache line.
> Any comment would be greatly appreciated

You're basically trading memory overhead for computational overhead.
And in this case I think that's fine.

I think your patch is fine and I'm going to apply it.
Can you cook up a 2.4.x version of this for me?

To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at