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From: David Sterba <dsterba@suse.cz>
To: Satoru Takeuchi <satoru.takeuchi@gmail.com>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>,
	Mark Fasheh <mfasheh@suse.de>, David Sterba <dsterba@suse.com>
Subject: Re: [PATCH] fix inconsistent device between /proc/pid/maps and stat
Date: Fri, 24 Mar 2017 12:58:59 +0100	[thread overview]
Message-ID: <20170324115859.GN14605@twin.jikos.cz> (raw)
In-Reply-To: <871strcs56.wl-satoru.takeuchi@gmail.com>

On Tue, Mar 21, 2017 at 10:53:09AM +0900, Satoru Takeuchi wrote:
> There have been some discussions about inconsistent device between /proc/pid/maps and stat(2).
> 
> http://thr3ads.net/btrfs-devel/2011/05/2346176-RFC-PATCH-0-2-btrfs-vfs-Return-same-device-in-stat-2-and-proc-pid-maps
> https://www.spinics.net/lists/linux-btrfs/msg09044.html
> https://patchwork.kernel.org/patch/2825842/
> https://patchwork.kernel.org/patch/2831525/
> 
> It's important since it breaks user programs like lsof(8). There was a patche by Mark to fix this problem.
> However, unfortunately, that patch is not merged so far.

And no variant of the get_map_dev will ever be merged. Reworking this
requires extensions to the superblock and subvolume structures, making
it more generic and suitable for VFS.

  reply	other threads:[~2017-03-24 12:13 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-21  1:53 [PATCH] fix inconsistent device between /proc/pid/maps and stat Satoru Takeuchi
2017-03-24 11:58 ` David Sterba [this message]
2017-03-24 13:32   ` Satoru Takeuchi
2017-03-24 17:29 Hirotaka Yamamoto

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