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From: Peter Zijlstra <peterz@infradead.org>
To: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Greg KH <greg@kroah.com>,
	mingo@kernel.org, mgorman@suse.de, juri.lelli@redhat.com,
	vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
	rostedt@goodmis.org, bsegall@google.com, bristot@redhat.com,
	joshdon@google.com, valentin.schneider@arm.com,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 6/9] debugfs: Implement debugfs_create_str()
Date: Fri, 26 Mar 2021 15:12:35 +0100	[thread overview]
Message-ID: <20210326141235.GI4746@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <1da9e61c-6973-2e0e-d898-7bf92ac5b1c4@rasmusvillemoes.dk>

On Fri, Mar 26, 2021 at 02:10:41PM +0100, Rasmus Villemoes wrote:
> On 26/03/2021 13.57, Greg KH wrote:
> > On Fri, Mar 26, 2021 at 01:53:59PM +0100, Rasmus Villemoes wrote:
> >> On 26/03/2021 12.38, Peter Zijlstra wrote:
> >>
> >>> Implement debugfs_create_str() to easily display names and such in
> >>> debugfs.
> >>
> >> Patches 7-9 don't seem to add any users of this. What's it for precisely?
> > 
> > It's used in patch 7, look close :)
> 
> Ah, macrology. But the write capability doesn't seem used, and I (still)
> fail to see how that could be useful.

Correct, it isn't used. But I didn't think it would be acceptible to
not implement the write side. OTOH, if Greg would be okay with it, I can
change it to:

ssize_t debugfs_write_file_str(struct file *file, const char __user *user_buf,
                               size_t count, loff_t *ppos)
{
        /* This is really only for read-only strings */
        return -EINVAL;
}
EXPORT_SYMBOL_GPL(debugfs_write_file_str);

That's certianly simpler.

  reply	other threads:[~2021-03-26 14:15 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-26 10:33 [PATCH 0/9] sched: Clean up SCHED_DEBUG Peter Zijlstra
2021-03-26 10:33 ` [PATCH 1/9] sched/numa: Allow runtime enabling/disabling of NUMA balance without SCHED_DEBUG Peter Zijlstra
2021-03-26 10:33 ` [PATCH 2/9] sched: Remove sched_schedstats sysctl out from under SCHED_DEBUG Peter Zijlstra
2021-03-26 10:33 ` [PATCH 3/9] sched: Dont make LATENCYTOP select SCHED_DEBUG Peter Zijlstra
2021-03-26 10:33 ` [PATCH 4/9] sched: Move SCHED_DEBUG to debugfs Peter Zijlstra
2021-03-26 11:06   ` Greg KH
2021-04-07 10:46   ` Valentin Schneider
2021-04-07 12:26     ` Peter Zijlstra
2021-04-07 12:57       ` Valentin Schneider
2021-03-26 10:33 ` [PATCH 5/9] sched,preempt: Move preempt_dynamic to debug.c Peter Zijlstra
2021-03-26 10:33 ` [PATCH 6/9] debugfs: Implement debugfs_create_str() Peter Zijlstra
2021-03-26 11:05   ` Greg KH
2021-03-26 11:18     ` Peter Zijlstra
2021-03-26 11:30       ` Greg KH
2021-03-26 11:38         ` [PATCH v2 " Peter Zijlstra
2021-03-26 12:18           ` Greg KH
2021-03-26 12:53           ` Rasmus Villemoes
2021-03-26 12:57             ` Greg KH
2021-03-26 13:10               ` Rasmus Villemoes
2021-03-26 14:12                 ` Peter Zijlstra [this message]
2021-03-26 14:19                   ` Greg KH
2021-03-26 14:22             ` Peter Zijlstra
2021-03-26 14:58               ` Rasmus Villemoes
2021-03-26 15:19                 ` Peter Zijlstra
2021-03-27 10:41                   ` Greg KH
2021-03-26 14:50   ` [PATCH v3 " Peter Zijlstra
2021-03-27 10:42     ` Greg KH
2021-03-27 22:24   ` [PATCH " Al Viro
2021-03-28  0:33     ` Steven Rostedt
2021-03-26 10:33 ` [PATCH 7/9] sched,debug: Convert sysctl sched_domains to debugfs Peter Zijlstra
2021-03-26 13:11   ` Dietmar Eggemann
2021-04-07 10:46   ` Valentin Schneider
2021-04-07 12:18     ` Peter Zijlstra
2021-03-26 10:34 ` [PATCH 8/9] sched: Move /proc/sched_debug " Peter Zijlstra
2021-03-26 11:05   ` Greg KH
2021-03-26 10:34 ` [PATCH 9/9] sched,fair: Alternative sched_slice() Peter Zijlstra
2021-03-26 12:08   ` Dietmar Eggemann
2021-03-26 14:07     ` Peter Zijlstra
2021-03-26 15:37   ` Vincent Guittot
2021-03-26 18:30     ` Peter Zijlstra
2021-04-12 10:14 [PATCH v2 0/9] sched: Clean up SCHED_DEBUG Peter Zijlstra
2021-04-12 10:14 ` [PATCH v2 6/9] debugfs: Implement debugfs_create_str() Peter Zijlstra

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