linux-kernel - Re: [2.6 patch] videobuf-core.c locking fixes

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]

Date:	Fri, 14 Dec 2007 07:26:15 -0200
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	Shane <gnome42@...il.com>
Cc:	Adrian Bunk <bunk@...sta.de>, Adrian Bunk <bunk@...nel.org>,
	Brandon Philips <brandon@...p.org>,
	linux-kernel@...r.kernel.org,
	video4linux-list <video4linux-list@...hat.com>
Subject: Re: [2.6 patch] videobuf-core.c locking fixes


Em Qua, 2007-12-12 às 16:22 -0500, Shane escreveu:
> > Yes it does! I was just going to send the same patch myself :)
> 
> But, I am now seeing some errors that weren't there in 2.6.23
> 
> kernel: bttv0: SCERR @ 1fa0401c,bits: HSYNC OFLOW SCERR*
> last message repeated 15 times
> kernel: bttv0: timeout: drop=16 irq=105615/105615, risc=1fa0401c,
> bits: HSYNC OFLOW
> kernel: bttv0: reset, reinitialize
> kernel: bttv0: PLL can sleep, using XTAL (28636363).
> 
> kernel: bttv0: SCERR @ 1fa0401c,bits: HSYNC OFLOW SCERR*
> last message repeated 15 times
> kernel: bttv0: timeout: drop=16 irq=106741/106741, risc=1fa0401c,
> bits: HSYNC OFLOW
> kernel: bttv0: reset, reinitialize
> kernel: bttv0: PLL can sleep, using XTAL (28636363).
> 
> These happen occasionally and it causes an EIO DQBUF
> error and the application has to re queue the buffers but it
> recovers OK. Not sure if it causes some sort of internal
> kernel corruption that will only be noticed later possibly?
> 
> I am using 15 userptr buffers so whatever is happening may
> be happening once per buffer sometimes. dunno

You may see such troubles with weak signals, where bttv is not capable of getting the proper sync.

-- 
Cheers,
Mauro

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/