netdev - Re: [PATCH resend] net: sock: Add option for memory optimized hints.

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Message-ID: <1466179622.7945.216.camel@edumazet-glaptop3.roam.corp.google.com>
Date:	Fri, 17 Jun 2016 09:07:02 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	peter enderborg <peter.enderborg@...ymobile.com>
Cc:	"open list:PTP HARDWARE CLOCK SUPPORT" <netdev@...r.kernel.org>
Subject: Re: [PATCH resend] net: sock: Add option for memory optimized hints.

On Fri, 2016-06-17 at 16:39 +0200, peter enderborg wrote:

> It is mainly for af_unix sockets, and the effect is
> quite significant when you hit a compaction, or with
> this patch avoid get in to compaction, but it
> can also be used for reducing the pressure on memory
> for tcp.

BTW, TCP always attempt order-3 allocations, even if you do a write(fd,
buffer, 4000)

So really your patch wont help.

We need to fix the mm layer (if needed), not add various works around.