linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Christian Brauner <christian@brauner.io>,
	Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH v2 0/2] close_range()
Date: Thu, 23 May 2019 14:34:31 -0700	[thread overview]
Message-ID: <CAHk-=wj5YZQ=ox+T1kc4RWp3KP+4VvXzvr8vOBbqcht6cOXufw@mail.gmail.com> (raw)
In-Reply-To: <20190523182152.GA6875@avx2>

On Thu, May 23, 2019 at 11:22 AM Alexey Dobriyan <adobriyan@gmail.com> wrote:
>
> > This is v2 of this patchset.
>
> We've sent fdmap(2) back in the day:

Well, if the main point of the exercise is performance, then fdmap()
is clearly inferior.

Sadly, with all the HW security mitigation, system calls are no longer cheap.

Would there ever be any other reason to traverse unknown open files
than to close them?

                   Linus

  reply	other threads:[~2019-05-23 21:34 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-23 18:21 [PATCH v2 0/2] close_range() Alexey Dobriyan
2019-05-23 21:34 ` Linus Torvalds [this message]
2019-05-24 10:27   ` Christian Brauner
2019-05-24 18:39   ` Alexey Dobriyan
2019-05-24 18:55     ` Linus Torvalds
2019-05-24 21:27       ` Alexey Dobriyan
2019-05-24 23:45         ` Al Viro
  -- strict thread matches above, loose matches on Subject: below --
2019-05-23 15:47 Christian Brauner

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAHk-=wj5YZQ=ox+T1kc4RWp3KP+4VvXzvr8vOBbqcht6cOXufw@mail.gmail.com' \
    --to=torvalds@linux-foundation.org \
    --cc=adobriyan@gmail.com \
    --cc=christian@brauner.io \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).