From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Peter Zijlstra <peterz@infradead.org>
Cc: "Joel Fernandes" <joel@joelfernandes.org>,
"Hugo Lefeuvre" <hle@owl.eu.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Greg Hartman" <ghartman@google.com>,
"Alistair Strachan" <strachan@google.com>,
"Arve Hjønnevåg" <arve@android.com>,
"Todd Kjos" <tkjos@android.com>,
"Martijn Coenen" <maco@android.com>,
"Christian Brauner" <christian@brauner.io>,
"Ingo Molnar" <mingo@redhat.com>,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sched/wait: introduce wait_event_freezable_hrtimeout
Date: Mon, 21 Jan 2019 13:01:20 +0100 [thread overview]
Message-ID: <1854135.8TqAkcxCUf@aspire.rjw.lan> (raw)
In-Reply-To: <20190118160450.GG14054@worktop.programming.kicks-ass.net>
On Friday, January 18, 2019 5:04:50 PM CET Peter Zijlstra wrote:
> On Fri, Jan 18, 2019 at 10:19:41AM -0500, Joel Fernandes wrote:
> > You should document the variable names in the header comments.
> >
> > Also, this new API appears to conflict with definition of 'freezable' in
> > wait_event_freezable I think,
> >
> > wait_event_freezable - sleep or freeze until condition is true.
> >
> > wait_event_freezable_hrtimeout - sleep but make sure freezer is not blocked.
> > (your API)
> >
> > It seems to me these are 2 different definitions of 'freezing' (or I could be
> > completely confused). But in the first case it calls try_to_freeze after
> > schedule(). In the second case (your new API), it calls freezable_schedule().
> >
> > So I am wondering why is there this difference in the 'meaning of freezable'.
> > In the very least, any such subtle differences should be documented in the
> > header comments IMO.
>
> Also; someone was recently hating on the whole freezing thing (again,
> and rightfully). I just cannot remember who; Rafael you remember?
Nope.
next prev parent reply other threads:[~2019-01-21 12:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-17 22:41 [PATCH] sched/wait: introduce wait_event_freezable_hrtimeout Hugo Lefeuvre
2019-01-18 7:17 ` Greg Kroah-Hartman
2019-01-18 7:48 ` Hugo Lefeuvre
2019-01-18 15:19 ` Joel Fernandes
2019-01-18 16:04 ` Peter Zijlstra
2019-01-21 12:01 ` Rafael J. Wysocki [this message]
2019-01-18 17:08 ` Hugo Lefeuvre
2019-01-19 1:53 ` Joel Fernandes
2019-01-19 10:29 ` Hugo Lefeuvre
2019-01-22 22:20 ` Joel Fernandes
2019-02-01 5:43 ` Hugo Lefeuvre
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