From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Luben Tuikov <luben@splentec.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, axboe@suse.de
Subject: Re: [PATCH]: jiffies wrap in ll_rw_blk.c
Date: 20 Nov 2002 21:19:33 +0000 [thread overview]
Message-ID: <1037827173.3267.78.camel@irongate.swansea.linux.org.uk> (raw)
In-Reply-To: <3DDBF413.C06DAF2E@splentec.com>
On Wed, 2002-11-20 at 20:44, Luben Tuikov wrote:
> --- ll_rw_blk.c.old Wed Nov 20 15:32:50 2002
> +++ ll_rw_blk.c Wed Nov 20 15:33:06 2002
> @@ -2092,7 +2092,7 @@
> complete(req->waiting);
>
> if (disk) {
> - unsigned long duration = jiffies - req->start_time;
> + unsigned long duration = (signed) jiffies - (signed) req->start_time;
> switch (rq_data_dir(req)) {
It was right before. Your patch breaks it. Think about it in unsigned
maths
0x00000002 - 0xFFFFFFFF = 0x00000003
Alan
next prev parent reply other threads:[~2002-11-20 20:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-20 20:44 Luben Tuikov
2002-11-20 21:06 ` Benjamin LaHaise
2002-11-20 21:18 ` Luben Tuikov
2002-11-20 21:19 ` Alan Cox [this message]
2002-11-20 21:00 ` Luben Tuikov
2002-11-20 21:31 ` Alan Cox
2002-11-20 21:15 ` Luben Tuikov
2002-11-20 22:20 ` Olivier Galibert
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