* [patch 1/8] irda/act200l-sir: replace schedule_timeout() with msleep()
@ 2004-09-01 21:05 janitor
2004-09-01 21:09 ` Jean Tourrilhes
0 siblings, 1 reply; 6+ messages in thread
From: janitor @ 2004-09-01 21:05 UTC (permalink / raw)
To: netdev; +Cc: jgarzik, jt, janitor
I would appreciate any comments from the janitor@sternweltens list.
Description: Replace schedule_timeout() with msleep() to guarantee the
task delays for the desired time.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Maximilian Attems <janitor@sternwelten.at>
---
linux-2.6.9-rc1-bk7-max/drivers/net/irda/act200l-sir.c | 3 +--
1 files changed, 1 insertion(+), 2 deletions(-)
diff -puN drivers/net/irda/act200l-sir.c~msleep-drivers_net_irda_act200l-sir drivers/net/irda/act200l-sir.c
--- linux-2.6.9-rc1-bk7/drivers/net/irda/act200l-sir.c~msleep-drivers_net_irda_act200l-sir 2004-09-01 19:35:31.000000000 +0200
+++ linux-2.6.9-rc1-bk7-max/drivers/net/irda/act200l-sir.c 2004-09-01 19:35:31.000000000 +0200
@@ -177,8 +177,7 @@ static int act200l_change_speed(struct s
/* Write control bytes */
sirdev_raw_write(dev, control, 3);
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(msecs_to_jiffies(5));
+ msleep(5);
/* Go back to normal mode */
sirdev_set_dtr_rts(dev, TRUE, TRUE);
_
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [patch 1/8] irda/act200l-sir: replace schedule_timeout() with msleep()
2004-09-01 21:05 [patch 1/8] irda/act200l-sir: replace schedule_timeout() with msleep() janitor
@ 2004-09-01 21:09 ` Jean Tourrilhes
2004-09-01 21:40 ` [Kernel-janitors] " maximilian attems
0 siblings, 1 reply; 6+ messages in thread
From: Jean Tourrilhes @ 2004-09-01 21:09 UTC (permalink / raw)
To: janitor; +Cc: netdev, jgarzik
On Wed, Sep 01, 2004 at 11:05:23PM +0200, janitor@sternwelten.at wrote:
>
>
>
>
>
>
> I would appreciate any comments from the janitor@sternweltens list.
I already commented that I don't like the confusing msleep()
API and I prefer the more explicit schedule_timeout().
But that's only me...
Jean
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Kernel-janitors] Re: [patch 1/8] irda/act200l-sir: replace schedule_timeout() with msleep()
2004-09-01 21:09 ` Jean Tourrilhes
@ 2004-09-01 21:40 ` maximilian attems
2004-09-01 21:48 ` Jean Tourrilhes
0 siblings, 1 reply; 6+ messages in thread
From: maximilian attems @ 2004-09-01 21:40 UTC (permalink / raw)
To: jt; +Cc: kj, netdev, jgarzik
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On Wed, 01 Sep 2004, Jean Tourrilhes wrote:
> On Wed, Sep 01, 2004 at 11:05:23PM +0200, janitor@sternwelten.at wrote:
> > I would appreciate any comments from the janitor@sternweltens list.
uups mangled some text there sorry for this silly email.
>
> I already commented that I don't like the confusing msleep()
> API and I prefer the more explicit schedule_timeout().
> But that's only me...
>
> Jean
hmm we have still archs were HZ < 100.
i find msleep use msecs units a lot more readable than
schedule_timeout((HZ + 99) / 100);
the schedule_timeout(HZ/100) gets safely converted with msleep.
--
maks
kernel janitor http://janitor.kernelnewbies.org/
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [patch 1/8] irda/act200l-sir: replace schedule_timeout() with msleep()
2004-09-01 21:40 ` [Kernel-janitors] " maximilian attems
@ 2004-09-01 21:48 ` Jean Tourrilhes
2004-09-01 22:03 ` [Kernel-janitors] " Nishanth Aravamudan
2004-09-01 22:58 ` maximilian attems
0 siblings, 2 replies; 6+ messages in thread
From: Jean Tourrilhes @ 2004-09-01 21:48 UTC (permalink / raw)
To: netdev, jgarzik, kj
On Wed, Sep 01, 2004 at 11:40:03PM +0200, maximilian attems wrote:
> On Wed, 01 Sep 2004, Jean Tourrilhes wrote:
>
> > On Wed, Sep 01, 2004 at 11:05:23PM +0200, janitor@sternwelten.at wrote:
> > > I would appreciate any comments from the janitor@sternweltens list.
> uups mangled some text there sorry for this silly email.
> >
> > I already commented that I don't like the confusing msleep()
> > API and I prefer the more explicit schedule_timeout().
> > But that's only me...
> >
> > Jean
>
> hmm we have still archs were HZ < 100.
> i find msleep use msecs units a lot more readable than
> schedule_timeout((HZ + 99) / 100);
>
> the schedule_timeout(HZ/100) gets safely converted with msleep.
I don't have complain about converting the (HZ + 99) / 100
expressions to something saner. My beef is the fact that msleep hide
the fact that a schedule might happen. This is important in the IrDA
code.
> maks
Jean
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Kernel-janitors] Re: [patch 1/8] irda/act200l-sir: replace schedule_timeout() with msleep()
2004-09-01 21:48 ` Jean Tourrilhes
@ 2004-09-01 22:03 ` Nishanth Aravamudan
2004-09-01 22:58 ` maximilian attems
1 sibling, 0 replies; 6+ messages in thread
From: Nishanth Aravamudan @ 2004-09-01 22:03 UTC (permalink / raw)
To: jt; +Cc: kj, netdev, jgarzik
[-- Attachment #1: Type: text/plain, Size: 1508 bytes --]
On Wed, Sep 01, 2004 at 02:48:15PM -0700, Jean Tourrilhes wrote:
> On Wed, Sep 01, 2004 at 11:40:03PM +0200, maximilian attems wrote:
> > On Wed, 01 Sep 2004, Jean Tourrilhes wrote:
> >
> > > On Wed, Sep 01, 2004 at 11:05:23PM +0200, janitor@sternwelten.at wrote:
> > > > I would appreciate any comments from the janitor@sternweltens list.
> > uups mangled some text there sorry for this silly email.
> > >
> > > I already commented that I don't like the confusing msleep()
> > > API and I prefer the more explicit schedule_timeout().
> > > But that's only me...
> > >
> > > Jean
> >
> > hmm we have still archs were HZ < 100.
> > i find msleep use msecs units a lot more readable than
> > schedule_timeout((HZ + 99) / 100);
> >
> > the schedule_timeout(HZ/100) gets safely converted with msleep.
>
> I don't have complain about converting the (HZ + 99) / 100
> expressions to something saner. My beef is the fact that msleep hide
> the fact that a schedule might happen. This is important in the IrDA
> code.
It *is* important for developers to realize that invoking msleep() may
involve giving up the CPU (ie. eventually calling schedule()); however,
I think my previous point, that the name itself (the "sleep" part, I mean)
is a fair and clear indication of this behavior, is valid. In those
cases where a busy-wait is desired, then mdelay() should be used, as
indicated by "delay". I think with this in mind & with a quick glance at
the source, if need be, the naming is quite safe.
-Nish
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Kernel-janitors] Re: [patch 1/8] irda/act200l-sir: replace schedule_timeout() with msleep()
2004-09-01 21:48 ` Jean Tourrilhes
2004-09-01 22:03 ` [Kernel-janitors] " Nishanth Aravamudan
@ 2004-09-01 22:58 ` maximilian attems
1 sibling, 0 replies; 6+ messages in thread
From: maximilian attems @ 2004-09-01 22:58 UTC (permalink / raw)
To: jt; +Cc: kj, netdev, jgarzik
[-- Attachment #1: Type: text/plain, Size: 737 bytes --]
On Wed, 01 Sep 2004, Jean Tourrilhes wrote:
> On Wed, Sep 01, 2004 at 11:40:03PM +0200, maximilian attems wrote:
> > On Wed, 01 Sep 2004, Jean Tourrilhes wrote:
..
> >
> > hmm we have still archs were HZ < 100.
> > i find msleep use msecs units a lot more readable than
> > schedule_timeout((HZ + 99) / 100);
> >
> > the schedule_timeout(HZ/100) gets safely converted with msleep.
>
> I don't have complain about converting the (HZ + 99) / 100
> expressions to something saner. My beef is the fact that msleep hide
> the fact that a schedule might happen. This is important in the IrDA
> code.
sorry my woding was confusing:
(HZ + 99) / 100 is correct!
as msleep(10)
--
maks
kernel janitor http://janitor.kernelnewbies.org/
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^ permalink raw reply [flat|nested] 6+ messages in thread
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2004-09-01 21:05 [patch 1/8] irda/act200l-sir: replace schedule_timeout() with msleep() janitor
2004-09-01 21:09 ` Jean Tourrilhes
2004-09-01 21:40 ` [Kernel-janitors] " maximilian attems
2004-09-01 21:48 ` Jean Tourrilhes
2004-09-01 22:03 ` [Kernel-janitors] " Nishanth Aravamudan
2004-09-01 22:58 ` maximilian attems
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