From: Florian Westphal <fw@strlen.de>
To: David Laight <David.Laight@ACULAB.COM>
Cc: 'Pablo Neira Ayuso' <pablo@netfilter.org>,
"netfilter-devel@vger.kernel.org"
<netfilter-devel@vger.kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: Re: [PATCH 06/26] netfilter: conntrack: align nf_conn on cacheline boundary
Date: Wed, 6 Jul 2016 17:01:25 +0200 [thread overview]
Message-ID: <20160706150125.GC2243@breakpoint.cc> (raw)
In-Reply-To: <063D6719AE5E284EB5DD2968C1650D6D5F4F18C1@AcuExch.aculab.com>
David Laight <David.Laight@ACULAB.COM> wrote:
> From: Pablo Neira Ayuso
> > Sent: 06 July 2016 15:24
> > From: Florian Westphal <fw@strlen.de>
> >
> > increases struct size by 32 bytes (288 -> 320), but it is the right thing,
> > else any attempt to (re-)arrange nf_conn members by cacheline won't work.
> ...
> > nf_conntrack_cachep = kmem_cache_create("nf_conntrack",
> > sizeof(struct nf_conn), 0,
> > - SLAB_DESTROY_BY_RCU, NULL);
> > + SLAB_DESTROY_BY_RCU | SLAB_HWCACHE_ALIGN, NULL);
>
> What happens on systems with cache lines that are longer than 64 bytes?
Sorry, I don't have a secret decoder ring.
HWCACHE_ALIGN is used for several other net slab caches, including
skbuff, so why is this a problem here?
next prev parent reply other threads:[~2016-07-06 15:01 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-06 14:23 [PATCH 00/26] Netfilter updates for net-next Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 01/26] bridge: netfilter: checkpatch data type fixes Pablo Neira Ayuso
2016-07-06 21:32 ` Stephen Hemminger
2016-07-06 14:23 ` [PATCH 02/26] netfilter: helper: avoid extra expectation iterations on unregister Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 03/26] netfilter: x_tables: fix possible ZERO_SIZE_PTR pointer dereferencing error Pablo Neira Ayuso
2016-07-06 18:11 ` Sergei Shtylyov
2016-07-06 14:23 ` [PATCH 04/26] netfilter: nf_log: handle NFPROTO_INET properly in nf_logger_[find_get|put] Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 05/26] netfilter: xt_TRACE: add explicitly nf_logger_find_get call Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 06/26] netfilter: conntrack: align nf_conn on cacheline boundary Pablo Neira Ayuso
2016-07-06 14:45 ` David Laight
2016-07-06 15:01 ` Florian Westphal [this message]
2016-07-06 14:23 ` [PATCH 07/26] netfilter: make comparision helpers stub functions in ZONES=n case Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 08/26] netfilter: nf_log: Remove NULL check Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 09/26] netfilter: move zone info into struct nf_conn Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 10/26] netfilter: Allow xt_owner in any user namespace Pablo Neira Ayuso
2017-10-18 23:00 ` [10/26] " Andrei Vagin
2016-07-06 14:23 ` [PATCH 11/26] netfilter: nf_reject_ipv4: don't send tcp RST if the packet is non-TCP Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 12/26] netfilter: xt_NFLOG: nflog-range does not truncate packets Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 13/26] netfilter: nf_tables: add generic macros to check for generation mask Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 14/26] netfilter: nf_tables: add generation mask to tables Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 15/26] netfilter: nf_tables: add generation mask to chains Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 16/26] netfilter: nf_tables: add generation mask to sets Pablo Neira Ayuso
2016-07-06 14:23 ` [PATCH 17/26] netfilter: nft_rbtree: check for next generation when deactivating elements Pablo Neira Ayuso
2016-07-06 14:24 ` [PATCH 18/26] netfilter: nft_hash: support deletion of inactive elements Pablo Neira Ayuso
2016-07-06 14:24 ` [PATCH 19/26] netfilter: conntrack: allow increasing bucket size via sysctl too Pablo Neira Ayuso
2016-07-06 14:24 ` [PATCH 20/26] netfilter: nf_tables: get rid of NFT_BASECHAIN_DISABLED Pablo Neira Ayuso
2016-07-06 14:24 ` [PATCH 21/26] netfilter: nf_tables: add support for inverted logic in nft_lookup Pablo Neira Ayuso
2016-07-06 14:24 ` [PATCH 22/26] netfilter: x_tables: simplify ip{6}table_mangle_hook() Pablo Neira Ayuso
2016-07-06 14:24 ` [PATCH 23/26] etherdevice.h & bridge: netfilter: Add and use ether_addr_equal_masked Pablo Neira Ayuso
2016-07-06 14:24 ` [PATCH 24/26] netfilter: Remove references to obsolete CONFIG_IP_ROUTE_FWMARK Pablo Neira Ayuso
2016-07-06 14:24 ` [PATCH 25/26] netfilter: Convert FWINV<[foo]> macros and uses to NF_INVF Pablo Neira Ayuso
2016-07-06 14:24 ` [PATCH 26/26] netfilter: nf_log: fix error on write NONE to logger choice sysctl Pablo Neira Ayuso
2016-07-06 16:15 ` [PATCH 00/26] Netfilter updates for net-next David Miller
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