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From: Ken-ichirou MATSUZAWA <chamaken@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org, daniel@iogearbox.net, fw@strlen.de
Subject: Re: [PATCH net] netlink: rx mmap: fix POLLIN condition
Date: Fri, 28 Aug 2015 16:00:59 +0900	[thread overview]
Message-ID: <20150828070058.GA32596@gmail.com> (raw)
In-Reply-To: <20150825.201712.2151042716686513603.davem@davemloft.net>

 Thank you for the reply.
 
On Tue, Aug 25, 2015 at 08:17:12PM -0700, David Miller wrote:
> So if netlink_forward_ring() _actually_ sees an entry that we should
> advance past, it will cycle through the whole ring, advancing ring->head
> until it equals the "ring->head != head" loop test fails.
> 
> We should definitely fix this bug first.

I should have realized it, sorry. I think the following patch will
fix it, would you review it?

> As per your patch, I wonder if a backwards scan would be faster.

I think so, thanks. I will resend it after netlink_forward_ring()
fix is applied.

Thanks,
Ken

  reply	other threads:[~2015-08-28  7:01 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-22 13:17 [RFC PATCH 0/5] netlink: mmap kernel panic and some issues Ken-ichirou MATSUZAWA
2015-08-12  8:28 ` [PATCHv1 net-next 0/5] netlink: mmap: " Ken-ichirou MATSUZAWA
2015-08-12  8:31   ` [PATCHv1 net-next 1/5] netlink: mmap: introduce mmaped skb helper functions Ken-ichirou MATSUZAWA
2015-08-12  8:32   ` [PATCHv1 net-next 2/5] netlink: mmap: apply " Ken-ichirou MATSUZAWA
2015-08-12  8:34   ` [PATCHv1 net-next 3/5] netlink: mmap: fix status for not delivered skb Ken-ichirou MATSUZAWA
2015-08-12  8:35   ` [PATCHv1 net-next 4/5] netlink: mmap: update tx type check Ken-ichirou MATSUZAWA
2015-08-12  8:38   ` [PATCHv1 net-next 5/5] netlink: mmap: notify only when NL_MMAP_STATUS_VALID frame exists Ken-ichirou MATSUZAWA
2015-08-12 23:38   ` [PATCHv1 net-next 0/5] netlink: mmap: kernel panic and some issues David Miller
2015-08-14  8:58     ` Ken-ichirou MATSUZAWA
2015-08-14 10:01       ` Daniel Borkmann
2015-08-14 10:38         ` Daniel Borkmann
2015-08-15  2:25           ` Ken-ichirou MATSUZAWA
2015-08-17 21:02           ` David Miller
2015-08-19 14:29             ` Daniel Borkmann
2015-09-02  0:04               ` Ken-ichirou MATSUZAWA
2015-09-02  9:47                 ` Daniel Borkmann
2015-09-02 11:35                   ` Ken-ichirou MATSUZAWA
2015-09-02 15:56                     ` Daniel Borkmann
2015-09-02 22:27                       ` Ken-ichirou MATSUZAWA
2015-09-07 14:54             ` Daniel Borkmann
2015-09-09  5:59               ` David Miller
2015-09-09  8:53               ` Thomas Graf
2015-09-09  9:22                 ` Daniel Borkmann
2015-08-20  3:43           ` [PATCH net] netlink: mmap: fix tx type check Ken-ichirou MATSUZAWA
2015-08-23 23:06             ` David Miller
2015-08-20  5:54           ` [PATCH net] netlink: rx mmap: fix POLLIN condition Ken-ichirou MATSUZAWA
2015-08-26  3:17             ` David Miller
2015-08-28  7:00               ` Ken-ichirou MATSUZAWA [this message]
2015-08-28  7:05                 ` [PATCH net] netlink: mmap: fix lookup frame position Ken-ichirou MATSUZAWA
2015-08-29  5:26                   ` David Miller
2015-08-30 22:54                 ` [PATCH net] netlink: rx mmap: fix POLLIN condition Ken-ichirou MATSUZAWA
2015-08-31  4:56                   ` David Miller
2015-08-20  7:07           ` [PATCH net] netlink: mmap: fix status setting in skb destructor Ken-ichirou MATSUZAWA
2015-08-26  3:22             ` David Miller
2015-08-28  7:37               ` Ken-ichirou MATSUZAWA

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