From: Al Viro <viro@ZenIV.linux.org.uk>
To: Enrico Weigelt <lkml@metux.net>
Cc: Richard Weinberger <richard.weinberger@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: fs_struct refcounting: spinlock vs atomic
Date: Thu, 15 Feb 2018 18:52:04 +0000 [thread overview]
Message-ID: <20180215185204.GD30522@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20180215183956.GC30522@ZenIV.linux.org.uk>
On Thu, Feb 15, 2018 at 06:39:57PM +0000, Al Viro wrote:
> Not true. We also assume that once fs_struct has been locked, the number of
> tasks with reference to it won't change. See fs/exec.c:check_unsafe_exec(),
> for example.
PS: any discussion of VFS and filesystems stuff belongs on fsdevel; Cc to l-k
is fine, but don't expect anyone to be able to reliably spot it there.
l-k is far too high volume (and low S/N) to keep up with it; some of us have
entirely given up on it (Linus is certainly not the only one who'd unsubscribed
from l-k many years ago), some try to scan it for something relevant, but
latency and reliability of such scans inevitably sucks.
prev parent reply other threads:[~2018-02-15 18:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-14 21:13 fs_struct refcounting: spinlock vs atomic Enrico Weigelt
2018-02-15 9:14 ` Richard Weinberger
2018-02-15 13:46 ` Enrico Weigelt
2018-02-15 18:39 ` Al Viro
2018-02-15 18:52 ` Al Viro [this message]
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=20180215185204.GD30522@ZenIV.linux.org.uk \
--to=viro@zeniv.linux.org.uk \
--cc=linux-kernel@vger.kernel.org \
--cc=lkml@metux.net \
--cc=richard.weinberger@gmail.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.