From: Bob Copeland <me@bobcopeland.com>
To: Nick Kossifidis <mickflemm@gmail.com>
Cc: Jiri Slaby <jirislaby@gmail.com>,
Sitsofe Wheeler <sitsofe@yahoo.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org,
ath5k-devel@venema.h4ckr.net,
"Luis R. Rodriguez" <lrodriguez@atheros.com>
Subject: Re: [TIP] BUG kmalloc-4096: Poison overwritten (ath5k_rx_skb_alloc)
Date: Tue, 24 Feb 2009 08:58:17 -0500 [thread overview]
Message-ID: <20090224135817.GB6019@hash.localnet> (raw)
In-Reply-To: <40f31dec0902231508l512af5b7w68cfcc0bdf3cfa87@mail.gmail.com>
On Tue, Feb 24, 2009 at 01:08:03AM +0200, Nick Kossifidis wrote:
> He does an extra check...
>
> /*
> * Given the use of a self-linked tail be very sure that the hw is
> * done with this descriptor; the hw may have done this descriptor
> * once and picked it up again...make sure the hw has moved on.
> */
> if ((ands->ds_rxstatus1&AR_Done) == 0 && OS_REG_READ(ah, AR_RXDP) == pa)
> return HAL_EINPROGRESS;
Sounds like we definitely need that. If the hw uses up all the dma buffers
in one go, there's a good chance we can send the skb to mac80211 while
the hardware is still using it. I guess an easy way to test would be to
set the max rx buffers to 3 or so and watch the fireworks.
--
Bob Copeland %% www.bobcopeland.com
next prev parent reply other threads:[~2009-02-24 13:58 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-22 11:18 [TIP] BUG kmalloc-4096: Poison overwritten (ath5k_rx_skb_alloc) Sitsofe Wheeler
2009-02-22 11:18 ` Sitsofe Wheeler
2009-02-22 12:01 ` Jiri Slaby
2009-02-22 12:01 ` Jiri Slaby
2009-02-22 12:20 ` Sitsofe Wheeler
2009-02-22 12:20 ` Sitsofe Wheeler
2009-02-22 12:47 ` Jiri Slaby
2009-02-22 12:47 ` Jiri Slaby
2009-02-22 14:47 ` Frederic Weisbecker
2009-02-22 14:47 ` Frederic Weisbecker
2009-02-22 17:02 ` Sitsofe Wheeler
2009-02-22 17:10 ` Frederic Weisbecker
2009-02-22 19:27 ` Jiri Slaby
2009-02-22 19:42 ` Frederic Weisbecker
2009-02-22 20:18 ` Sitsofe Wheeler
2009-02-22 20:27 ` Jiri Slaby
2009-02-22 20:30 ` Frederic Weisbecker
2009-02-22 21:56 ` Jiri Slaby
2009-02-22 22:21 ` Sitsofe Wheeler
2009-02-22 23:20 ` Jiri Slaby
2009-02-23 15:35 ` Bob Copeland
2009-02-23 16:03 ` Nick Kossifidis
2009-02-23 16:15 ` Nick Kossifidis
2009-02-23 16:21 ` Bob Copeland
2009-02-23 16:27 ` Nick Kossifidis
2009-02-23 16:30 ` Bob Copeland
2009-02-23 16:41 ` Nick Kossifidis
2009-02-23 16:44 ` Bob Copeland
2009-02-23 16:16 ` pat-lkml
2009-02-23 16:20 ` Nick Kossifidis
2009-02-23 22:22 ` Jiri Slaby
2009-02-23 22:43 ` Jiri Slaby
2009-02-23 23:08 ` Nick Kossifidis
2009-02-24 13:58 ` Bob Copeland [this message]
2009-02-24 21:47 ` Jiri Slaby
2009-02-25 14:01 ` Sitsofe Wheeler
2009-02-25 14:01 ` Sitsofe Wheeler
2009-02-26 1:06 ` Bob Copeland
2009-02-26 20:53 ` Jiri Slaby
2009-02-26 21:05 ` Bob Copeland
2009-02-26 13:59 ` Bob Copeland
2009-02-26 17:03 ` Sitsofe Wheeler
2009-03-02 17:34 ` [ath5k-devel] " Bob Copeland
2009-03-02 17:34 ` Bob Copeland
2009-03-03 4:12 ` Bob Copeland
2009-03-03 20:03 ` Sitsofe Wheeler
2009-03-04 12:07 ` Bob Copeland
2009-03-06 9:42 ` Sitsofe Wheeler
2009-03-07 4:47 ` Bob Copeland
2009-03-07 8:04 ` Sitsofe Wheeler
2009-03-07 13:34 ` Bob Copeland
2009-03-08 3:09 ` Bob Copeland
2009-03-08 9:28 ` Jiri Slaby
2009-03-08 16:10 ` Bob Copeland
2009-03-10 0:43 ` Bob Copeland
2009-03-10 8:19 ` Sitsofe Wheeler
2009-03-12 6:10 ` Sitsofe Wheeler
2009-03-12 6:10 ` Sitsofe Wheeler
2009-03-13 9:52 ` Sitsofe Wheeler
2009-03-13 12:28 ` Bob Copeland
2009-03-20 13:14 ` Bob Copeland
2009-03-29 14:24 ` Sitsofe Wheeler
2009-03-29 15:14 ` Bob Copeland
2009-03-31 8:30 ` Sitsofe Wheeler
2009-05-13 21:44 ` Sitsofe Wheeler
2009-05-13 21:44 ` Sitsofe Wheeler
2009-05-15 4:09 ` Bob Copeland
2009-05-18 10:05 ` Sitsofe Wheeler
2009-05-22 9:39 ` Sitsofe Wheeler
2009-05-22 12:06 ` Bob Copeland
2009-05-26 21:10 ` Sitsofe Wheeler
2009-06-28 20:23 ` Sitsofe Wheeler
2009-07-14 2:24 ` Bob Copeland
2009-02-26 1:11 ` Bob Copeland
2009-02-22 20:17 ` Bob Copeland
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090224135817.GB6019@hash.localnet \
--to=me@bobcopeland.com \
--cc=ath5k-devel@venema.h4ckr.net \
--cc=fweisbec@gmail.com \
--cc=jirislaby@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-wireless@vger.kernel.org \
--cc=lrodriguez@atheros.com \
--cc=mickflemm@gmail.com \
--cc=sitsofe@yahoo.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.