linux-kernel - Re: [PATCH 0/5] fuse: handle release synchronously (v4)

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Message-ID: <20141018182454.GF7996@ZenIV.linux.org.uk>
Date:	Sat, 18 Oct 2014 19:24:54 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Maxim Patlasov <mpatlasov@...allels.com>,
	Anand Avati <avati@...ster.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Michael j Theall <mtheall@...ibm.com>,
	fuse-devel <fuse-devel@...ts.sourceforge.net>
Subject: Re: [PATCH 0/5] fuse: handle release synchronously (v4)

On Sat, Oct 18, 2014 at 08:01:13PM +0200, Miklos Szeredi wrote:

> And what you don't get is that there's a deep difference between those
> and the /proc file access case.
> 
> And the difference is that one is done because of an explicit action
> by the holder of the open file.  And the other is done by some random
> process doing non-invasive examination of the holder of the open-file.

Such as ls -l /proc/*/fd/*?  That will give you the same transient EBUSY
from umount, if it hits the right moment...
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