From: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
To: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: linux-kernel@vger.kernel.org, torvalds@transmeta.com
Subject: Re: [PATCH] Linux 0.01 disk lockup
Date: Thu, 27 Sep 2001 10:47:06 -0300 [thread overview]
Message-ID: <20010927104706.B2968@conectiva.com.br> (raw)
In-Reply-To: <Pine.LNX.3.96.1010927150812.28147B-100000@artax.karlin.mff.cuni.cz>
In-Reply-To: <Pine.LNX.3.96.1010927150812.28147B-100000@artax.karlin.mff.cuni.cz>; from mikulas@artax.karlin.mff.cuni.cz on Thu, Sep 27, 2001 at 03:34:11PM +0200
Em Thu, Sep 27, 2001 at 03:34:11PM +0200, Mikulas Patocka escreveu:
> Linux 0.01 has a bug in disk request sorting - when interrupt happens
> while sorting is active, the interrupt routine won't clear do_hd - thus
> the disk will stay locked up forever.
>
> Function add_request also lacks memory barriers - the compiler could
> reorder writes to variable sorting and writes to request queue - producing
> race conditions. Because gcc 1.40 does not have __asm__("":::"memory"), I
> had to use dummy function call as a memory barrier.
>
> The following patch fixes both issues.
Fantastic! who is the maintainer for the 0.x kernel series these days? I
thought that 2.0 was Dave W., 2.2 was Alan, 2.4 Linus, so now we have to
find people for 1.2 and finally get 1.2.14 released, man, how I wanted one
with the dynamic PPP code in back in those days... 8)
- Arnaldo
next prev parent reply other threads:[~2001-09-27 13:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-27 13:34 [PATCH] Linux 0.01 disk lockup Mikulas Patocka
2001-09-27 13:47 ` Arnaldo Carvalho de Melo [this message]
2001-09-27 20:02 ` Paul Gortmaker
2001-09-27 21:18 ` Aaron Tiensivu
2001-09-27 15:12 ` Richard Gooch
2001-09-27 15:18 ` Roeland Th. Jansen
2001-09-27 15:20 ` Richard Gooch
2001-09-27 16:07 ` Mikulas Patocka
2001-09-27 15:27 ` Linus Torvalds
2001-09-27 16:08 ` Mikulas Patocka
2001-09-29 21:16 ` [PATCH] Linux 0.01 disk lockup - read the old (1991) archives Rob Landley
2001-09-30 12:29 ` Alan Cox
2001-10-01 14:08 ` Rob Landley
2001-10-01 18:36 ` Virtual terminal support Rok Pergarec
2001-10-01 19:22 ` James Simmons
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