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Date: Wed, 01 Apr 2020 14:58:22 +0100 From: David Howells <dhowells@...hat.com> To: unlisted-recipients:; (no To-header on input) Cc: dhowells@...hat.com, Miklos Szeredi <miklos@...redi.hu>, Karel Zak <kzak@...hat.com>, Christian Brauner <christian.brauner@...ntu.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Al Viro <viro@...iv.linux.org.uk>, dray@...hat.com, Miklos Szeredi <mszeredi@...hat.com>, Steven Whitehouse <swhiteho@...hat.com>, Jeff Layton <jlayton@...hat.com>, Ian Kent <raven@...maw.net>, andres@...razel.de, keyrings@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, Lennart Poettering <lennart@...ttering.net>, Aleksa Sarai <cyphar@...har.com> Subject: Re: Upcoming: Notifications, FS notifications and fsinfo() David Howells <dhowells@...hat.com> wrote: > > Attached patch applies against readfile patch. > > But doesn't actually do what Karel asked for. show_mountinfo() itself does > not give you what Karel asked for. Plus there's more information you need to > add to it. And arguably, it's worse than just reading /proc/mounts. If you get a notification that something changed (ie. you poll /proc/mounts or mount notifications gives you an overrun) you now have to read *every* /mountfs/*/info file. That is way more expensive. David
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