linux-kernel - Re: [PATCH] irq: Add node_affinity CPU masks for smarter irqbalance hints

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: <4B0C2CCA.6030006@gmail.com>
Date:	Tue, 24 Nov 2009 19:58:18 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
CC:	peter.p.waskiewicz.jr@...el.com, peterz@...radead.org,
	arjan@...ux.intel.com, yong.zhang0@...il.com,
	linux-kernel@...r.kernel.org, arjan@...ux.jf.intel.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH] irq: Add node_affinity CPU masks for smarter irqbalance
 hints

David Miller a écrit :
> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Tue, 24 Nov 2009 19:26:15 +0100
> 
>> It seems complex to me, maybe optimal thing would be to use a NUMA policy to
>> spread vmalloc() allocations to all nodes to get a good bandwidth...
> 
> vmalloc() and sk_buff's don't currently mix and I really don't see us
> every allowing them to :-)

I think Peter was referring to tx/rx rings buffers, not sk_buffs.

They (ring buffers) are allocated with vmalloc() at driver init time.

And Tom pointed out that our rx sk_buff allocation should be using the node
of requester, no need to hardcode node number per rx queue (or per device as of today)


--
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/