linux-kernel - Re: [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOC reserves

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20120517.161245.2279668542058844372.davem@davemloft.net>
Date:	Thu, 17 May 2012 16:12:45 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	mgorman@...e.de
Cc:	akpm@...ux-foundation.org, linux-mm@...ck.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	neilb@...e.de, a.p.zijlstra@...llo.nl, michaelc@...wisc.edu,
	emunson@...bm.net
Subject: Re: [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOC
 reserves

From: Mel Gorman <mgorman@...e.de>
Date: Thu, 17 May 2012 15:50:24 +0100

> Change the skb allocation API to indicate RX usage and use this to fall
> back to the PFMEMALLOC reserve when needed. SKBs allocated from the
> reserve are tagged in skb->pfmemalloc. If an SKB is allocated from
> the reserve and the socket is later found to be unrelated to page
> reclaim, the packet is dropped so that the memory remains available
> for page reclaim. Network protocols are expected to recover from this
> packet loss.
> 
> [davem@...emloft.net: Use static branches, coding style corrections]
> [a.p.zijlstra@...llo.nl: Ideas taken from various patches]
> Signed-off-by: Mel Gorman <mgorman@...e.de>

Acked-by: David S. Miller <davem@...emloft.net>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/