From: Alexey Dobriyan <adobriyan@gmail.com>
To: Daniel Colascione <dancol@google.com>
Cc: Dave Chinner <david@fromorbit.com>,
Waiman Long <longman@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Luis Chamberlain <mcgrof@kernel.org>,
Kees Cook <keescook@chromium.org>,
Jonathan Corbet <corbet@lwn.net>,
linux-kernel <linux-kernel@vger.kernel.org>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
Linux FS Devel <linux-fsdevel@vger.kernel.org>,
Davidlohr Bueso <dave@stgolabs.net>,
Miklos Szeredi <miklos@szeredi.hu>,
Randy Dunlap <rdunlap@infradead.org>
Subject: Re: [PATCH 0/2] /proc/stat: Reduce irqs counting performance overhead
Date: Tue, 8 Jan 2019 02:49:01 +0300 [thread overview]
Message-ID: <20190107234901.GA27074@avx2> (raw)
In-Reply-To: <CAKOZueuHGg=F8se1AQqswZWCEco=ScmudWq5X5s1qS4+LCtgWw@mail.gmail.com>
On Mon, Jan 07, 2019 at 05:41:28PM -0500, Daniel Colascione wrote:
> There should be a general-purpose way for /proc file readers to tell
> the kernel which bits of information interest them on a particular read
> syscall sequence or particular open(2) or something.
This opens a pandora box full of ioctls. /proc supports ioctls on files
which aren't /proc/$PID and /proc/sys/* though.
So people made a mess with allegedly easy text files and now they
continue to make even more mess adding ioctls on top.
next prev parent reply other threads:[~2019-01-07 23:49 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-07 15:12 [PATCH 0/2] /proc/stat: Reduce irqs counting performance overhead Waiman Long
2019-01-07 15:12 ` [PATCH 1/2] /proc/stat: Extract irqs counting code into show_stat_irqs() Waiman Long
2019-01-07 21:42 ` Kees Cook
2019-01-07 15:12 ` [PATCH 2/2] /proc/stat: Add sysctl parameter to control irq counts latency Waiman Long
2019-01-07 15:58 ` Matthew Wilcox
2019-01-07 16:07 ` Waiman Long
2019-01-07 16:14 ` Matthew Wilcox
2019-01-07 16:19 ` Waiman Long
2019-01-07 16:33 ` Alexey Dobriyan
2019-01-07 16:59 ` Waiman Long
[not found] ` <20190118084456.GA10690@shao2-debian>
2019-01-21 20:02 ` [LKP] [/proc/stat] 3047027b34: reaim.jobs_per_min -4.8% regression Kees Cook
2019-01-21 21:25 ` Alexey Dobriyan
2019-01-07 22:32 ` [PATCH 0/2] /proc/stat: Reduce irqs counting performance overhead Dave Chinner
2019-01-07 22:41 ` Daniel Colascione
2019-01-07 23:49 ` Alexey Dobriyan [this message]
2019-01-07 22:41 ` Waiman Long
2019-01-08 2:04 ` Dave Chinner
2019-01-08 16:11 ` Michal Hocko
2019-01-08 17:05 ` Waiman Long
2019-01-08 17:32 ` Waiman Long
2019-01-08 16:58 ` Waiman Long
2019-01-08 22:27 ` Dave Chinner
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