netdev - Re: [PATCH][net-next] vxlan: reduce dirty cache line in vxlan_find

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] [day] [month] [year] [list]

Message-Id: <20180819.111140.2282097352981887816.davem@davemloft.net>
Date:   Sun, 19 Aug 2018 11:11:40 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     lirongqing@...du.com
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH][net-next] vxlan: reduce dirty cache line in
 vxlan_find_mac

From: Li RongQing <lirongqing@...du.com>
Date: Sun, 19 Aug 2018 11:36:08 +0800

> vxlan_find_mac() unconditionally set f->used for every packet,
> this cause a cache miss for every packet, since remote, hlist
> and used of vxlan_fdb share the same cacheline.
> 
> With this change f->used is set only if not equal to jiffies
> This gives up to 5% speed-up with small packets.
> 
> Signed-off-by: Zhang Yu <zhangyu31@...du.com>
> Signed-off-by: Li RongQing <lirongqing@...du.com>

Please resubmit this when the net-next tree opens back up.

Thanks.