From: John Mathew <john.mathew@unikie.com>
To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
corbet@lwn.net, mingo@redhat.com, peterz@infradead.org,
juri.lelli@redhat.com,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
rostedt@goodmis.org, Benjamin Segall <bsegall@google.com>,
mgorman@suse.de, bristot@redhat.com, tsbogend@alpha.franken.de,
Lukas Bulwahn <lukas.bulwahn@gmail.com>,
x86@kernel.org, linux-mips@vger.kernel.org, tglx@linutronix.de,
mostafa.chamanara@gmail.com, willy@infradead.org,
Valentin Schneider <valentin.schneider@arm.com>,
Randy Dunlap <rdunlap@infradead.org>,
Mostafa Chamanara <mostafa.chamanara@basemark.com>,
Oleg Tsymbal <oleg.tsymbal@unikie.com>
Subject: Re: [RFC PATCH v5 3/3] docs: scheduler: Add introduction to scheduler context-switch
Date: Wed, 27 May 2020 11:17:08 +0300 [thread overview]
Message-ID: <CAJz2qXm4FKoqMMeM7n=dVpXm6Tko9edun49b=VVsN3j=xQCagQ@mail.gmail.com> (raw)
In-Reply-To: <20200526102511.GA5681@linux.vnet.ibm.com>
On Tue, May 26, 2020 at 1:26 PM Srikar Dronamraju
<srikar@linux.vnet.ibm.com> wrote:
>
> * john mathew <john.mathew@unikie.com> [2020-05-14 12:26:37]:
>
> > +
> > +Context Switching
> > +-----------------
> > +
> > +Context switching, the switching from a running task to another,
> > +is done by the context_switch() function defined in kernel/sched.c.
>
> context_switch is defined in kernel/sched/core.c
Fixed in v6.
>
> > +It is called by __schedule() when a new process has been selected to run.
> > +The execution flow is as follows:
> > +
> > +
> > + For a kernel task switching to a user task, switch_mm_irqs_off()
> > + replaces the address space of prev kernel task with the next from the user
> > + task. Same as for exiting process in this case, the context_switch()
>
> Did you mean existing instead of exiting?
I reworded the description in v6.
>
> > + function saves the pointer to the memory descriptor used by prev in the
> > + runqueue???s prev_mm field and resets prev task active address space.
Yes, hopefully better described in the v6.
Please review and ack.
> > +
> --
> Thanks and Regards
> Srikar Dronamraju
next prev parent reply other threads:[~2020-05-27 8:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-14 9:26 [RFC PATCH v5 0/3] Add scheduler overview documentation john mathew
2020-05-14 9:26 ` [RFC PATCH v5 1/3] docs: scheduler: Restructure scheduler documentation john mathew
2020-05-14 9:26 ` [RFC PATCH v5 2/3] docs: scheduler: Add scheduler overview documentation john mathew
2020-05-29 11:00 ` Peter Zijlstra
2020-05-29 14:10 ` Jonathan Corbet
2020-06-05 9:40 ` John Mathew
2020-06-23 7:17 ` John Mathew
2020-05-29 14:48 ` Vincent Guittot
2020-06-05 9:42 ` John Mathew
2020-05-14 9:26 ` [RFC PATCH v5 3/3] docs: scheduler: Add introduction to scheduler context-switch john mathew
2020-05-26 10:25 ` Srikar Dronamraju
2020-05-27 8:17 ` John Mathew [this message]
2020-05-25 16:35 ` [RFC PATCH v5 0/3] Add scheduler overview documentation Jonathan Corbet
2020-05-29 3:39 ` John Mathew
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