From: Eric Dumazet <eric.dumazet@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: roopa@cumulusnetworks.com, netdev@vger.kernel.org,
jhs@mojatatu.com, tgraf@suug.ch, nicolas.dichtel@6wind.com
Subject: Re: [PATCH net-next v5] rtnetlink: add new RTM_GETSTATS message to dump link stats
Date: Mon, 18 Apr 2016 19:22:19 -0700 [thread overview]
Message-ID: <1461032539.10638.143.camel@edumazet-glaptop3.roam.corp.google.com> (raw)
In-Reply-To: <20160418.214851.122286645854721047.davem@davemloft.net>
On Mon, 2016-04-18 at 21:48 -0400, David Miller wrote:
>
> And anyways, I get unaligned accesses without Roopa's changes :-/
>
> davem@patience:~$ ip l l
> [3391066.656729] Kernel unaligned access at TPC[7d6c14] loopback_get_stats64+0x74/0xa0
> [3391066.672020] Kernel unaligned access at TPC[7d6c18] loopback_get_stats64+0x78/0xa0
> [3391066.687282] Kernel unaligned access at TPC[7d6c1c] loopback_get_stats64+0x7c/0xa0
> [3391066.702573] Kernel unaligned access at TPC[7d6c20] loopback_get_stats64+0x80/0xa0
> [3391066.717858] Kernel unaligned access at TPC[8609dc] dev_get_stats+0x3c/0xe0
Yes, rtnl_fill_stats() probably has the same mistake.
commit 550bce59baf3f3059cd4ae1e268f08f2d2cb1d5c
Author: Roopa Prabhu <roopa@cumulusnetworks.com>
Date: Fri Apr 15 20:36:25 2016 -0700
rtnetlink: rtnl_fill_stats: avoid an unnecssary stats copy
This patch passes netlink attr data ptr directly to dev_get_stats
thus elimiating a stats copy.
Suggested-by: David Miller <davem@davemloft.net>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
next prev parent reply other threads:[~2016-04-19 2:22 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-18 21:10 [PATCH net-next v5] rtnetlink: add new RTM_GETSTATS message to dump link stats Roopa Prabhu
2016-04-18 21:35 ` Eric Dumazet
2016-04-19 0:57 ` David Miller
2016-04-19 1:48 ` David Miller
2016-04-19 2:22 ` Eric Dumazet [this message]
2016-04-19 2:40 ` Roopa Prabhu
2016-04-19 3:49 ` David Miller
2016-04-19 3:52 ` David Miller
2016-04-19 10:09 ` Johannes Berg
2016-04-19 10:48 ` Emmanuel Grumbach
2016-04-19 18:23 ` David Miller
2016-04-19 19:41 ` Johannes Berg
2016-04-20 1:53 ` David Ahern
2016-04-20 7:32 ` Johannes Berg
2016-04-20 12:48 ` Jiri Benc
2016-04-20 13:17 ` Johannes Berg
2016-04-20 13:34 ` Jiri Benc
2016-04-20 20:13 ` Johannes Berg
2016-04-19 2:30 ` roopa
2016-04-19 3:41 ` David Miller
2016-04-19 4:17 ` Eric Dumazet
2016-04-19 4:32 ` Eric Dumazet
2016-04-19 5:03 ` David Miller
2016-04-19 18:31 ` David Miller
2016-04-19 18:45 ` Eric Dumazet
2016-04-19 18:47 ` Eric Dumazet
2016-04-19 19:08 ` Nicolas Dichtel
2016-04-19 23:50 ` David Miller
2016-04-20 3:54 ` Roopa Prabhu
2016-04-20 8:57 ` [PATCH net-next 0/4] libnl: enhance API to ease 64bit alignment for attribute Nicolas Dichtel
2016-04-20 8:57 ` [PATCH net-next 1/4] netlink: fix test alignment in nla_align_64bit() Nicolas Dichtel
2016-04-20 9:33 ` Eric Dumazet
2016-04-20 9:44 ` Nicolas Dichtel
2016-04-20 9:57 ` Eric Dumazet
2016-04-20 10:14 ` Nicolas Dichtel
2016-04-20 14:31 ` [PATCH net-next] net: fix HAVE_EFFICIENT_UNALIGNED_ACCESS typos Eric Dumazet
2016-04-20 15:03 ` David Miller
2016-04-20 8:57 ` [PATCH net-next 2/4] libnl: add more helpers to align attribute on 64-bit Nicolas Dichtel
2016-04-20 8:57 ` [PATCH net-next 3/4] ipmr: align RTA_MFC_STATS " Nicolas Dichtel
2016-04-20 8:57 ` [PATCH net-next 4/4] ip6mr: " Nicolas Dichtel
2016-04-21 16:58 ` [PATCH net-next v2 0/4] libnl: enhance API to ease 64bit alignment for attribute Nicolas Dichtel
2016-04-21 16:58 ` [PATCH net-next v2 1/4] libnl: add more helpers to align attributes on 64-bit Nicolas Dichtel
2016-04-21 16:58 ` [PATCH net-next v2 2/4] rtnl: use the new API to align IFLA_STATS* Nicolas Dichtel
2016-04-21 16:58 ` [PATCH net-next v2 3/4] ipmr: align RTA_MFC_STATS on 64-bit Nicolas Dichtel
2016-04-21 16:58 ` [PATCH net-next v2 4/4] ip6mr: " Nicolas Dichtel
2016-04-21 18:28 ` [PATCH net-next v2 0/4] libnl: enhance API to ease 64bit alignment for attribute David Miller
2016-04-21 22:00 ` Nicolas Dichtel
2016-04-22 5:31 ` David Miller
2016-04-19 19:05 ` [PATCH net-next v5] rtnetlink: add new RTM_GETSTATS message to dump link stats Roopa Prabhu
2016-04-19 22:49 ` David Miller
2016-04-20 3:53 ` Roopa Prabhu
2016-04-19 4:43 ` Roopa Prabhu
2016-04-19 7:45 ` Nicolas Dichtel
2016-04-19 16:00 ` David Miller
2016-04-19 8:26 ` Nicolas Dichtel
2016-04-19 19:55 ` Paul Moore
2016-04-19 20:40 ` Roopa Prabhu
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