From: Philipp Reisner <philipp.reisner@linbit.com>
To: kernel-janitors@vger.kernel.org
Subject: Re: [patch] drbd: cleanup: change "<= 0" to "== 0"
Date: Mon, 23 Aug 2010 16:03:22 +0000 [thread overview]
Message-ID: <201008231803.22680.philipp.reisner@linbit.com> (raw)
In-Reply-To: <20100811223845.GE645@bicker>
Am Montag, 23. August 2010, um 12:34:29 schrieb Jens Axboe:
> On 2010-08-12 00:38, Dan Carpenter wrote:
> > dt is unsigned so it's never less than zero. We are calculating the
> > elapsed time, and that's never less than zero (unless there is a bug or
> > we invent time travel). The comparison here is just to guard against
> > divide by zero bugs.
> >
> > Signed-off-by: Dan Carpenter <error27@gmail.com>
> >
> > diff --git a/drivers/block/drbd/drbd_proc.c
> > b/drivers/block/drbd/drbd_proc.c index be3374b..4c0c4aa 100644
> > --- a/drivers/block/drbd/drbd_proc.c
> > +++ b/drivers/block/drbd/drbd_proc.c
> > @@ -118,7 +118,7 @@ static void drbd_syncer_progress(struct drbd_conf
> > *mdev, struct seq_file *seq)
> >
> > /* mean speed since syncer started
> >
> > * we do account for PausedSync periods */
> >
> > dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ;
> >
> > - if (dt <= 0)
> > + if (dt = 0)
> >
> > dt = 1;
> >
> > db = mdev->rs_total - rs_left;
> > dbdt = Bit2KB(db/dt);
>
> Lars et al, I'll let you pick this up.
Jens, we (LINBIT) feel responsible for picking this up. I work on that
tomorrow.
Best,
Phil
--
: Dipl-Ing Philipp Reisner
: LINBIT | Your Way to High Availability
: Tel: +43-1-8178292-50, Fax: +43-1-8178292-82
: http://www.linbit.com
DRBD(R) and LINBIT(R) are registered trademarks of LINBIT, Austria.
WARNING: multiple messages have this Message-ID (diff)
From: Philipp Reisner <philipp.reisner@linbit.com>
To: Jens Axboe <jaxboe@fusionio.com>
Cc: "kernel-janitors@vger.kernel.org"
<kernel-janitors@vger.kernel.org>,
Sam Ravnborg <sam@ravnborg.org>,
Dan Carpenter <error27@gmail.com>,
"drbd-user@lists.linbit.com" <drbd-user@lists.linbit.com>,
Lars Ellenberg <drbd-dev@lists.linbit.com>
Subject: Re: [Drbd-dev] [patch] drbd: cleanup: change "<= 0" to "== 0"
Date: Mon, 23 Aug 2010 18:03:22 +0200 [thread overview]
Message-ID: <201008231803.22680.philipp.reisner@linbit.com> (raw)
In-Reply-To: <4C724EB5.8030807@fusionio.com>
Am Montag, 23. August 2010, um 12:34:29 schrieb Jens Axboe:
> On 2010-08-12 00:38, Dan Carpenter wrote:
> > dt is unsigned so it's never less than zero. We are calculating the
> > elapsed time, and that's never less than zero (unless there is a bug or
> > we invent time travel). The comparison here is just to guard against
> > divide by zero bugs.
> >
> > Signed-off-by: Dan Carpenter <error27@gmail.com>
> >
> > diff --git a/drivers/block/drbd/drbd_proc.c
> > b/drivers/block/drbd/drbd_proc.c index be3374b..4c0c4aa 100644
> > --- a/drivers/block/drbd/drbd_proc.c
> > +++ b/drivers/block/drbd/drbd_proc.c
> > @@ -118,7 +118,7 @@ static void drbd_syncer_progress(struct drbd_conf
> > *mdev, struct seq_file *seq)
> >
> > /* mean speed since syncer started
> >
> > * we do account for PausedSync periods */
> >
> > dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ;
> >
> > - if (dt <= 0)
> > + if (dt == 0)
> >
> > dt = 1;
> >
> > db = mdev->rs_total - rs_left;
> > dbdt = Bit2KB(db/dt);
>
> Lars et al, I'll let you pick this up.
Jens, we (LINBIT) feel responsible for picking this up. I work on that
tomorrow.
Best,
Phil
--
: Dipl-Ing Philipp Reisner
: LINBIT | Your Way to High Availability
: Tel: +43-1-8178292-50, Fax: +43-1-8178292-82
: http://www.linbit.com
DRBD(R) and LINBIT(R) are registered trademarks of LINBIT, Austria.
next prev parent reply other threads:[~2010-08-23 16:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-11 22:38 [patch] drbd: cleanup: change "<= 0" to "== 0" Dan Carpenter
2010-08-11 22:38 ` [Drbd-dev] " Dan Carpenter
2010-08-23 10:34 ` Jens Axboe
2010-08-23 10:34 ` [Drbd-dev] " Jens Axboe
2010-08-23 16:03 ` Philipp Reisner [this message]
2010-08-23 16:03 ` Philipp Reisner
2010-08-24 8:38 ` Philipp Reisner
2010-08-24 8:38 ` [Drbd-dev] " Philipp Reisner
2010-08-24 8:41 ` Jens Axboe
2010-08-24 8:41 ` [Drbd-dev] " Jens Axboe
2010-08-24 9:10 ` Philipp Reisner
2010-08-24 9:10 ` [Drbd-dev] " Philipp Reisner
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