linux-kernel - Re: [PATCH 2/4] fsfreeze: manage kill signal when sb_start

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Message-ID: <20130406215033.GM4068@ZenIV.linux.org.uk>
Date:	Sat, 6 Apr 2013 22:50:33 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Marco Stornelli <marco.stornelli@...il.com>
Cc:	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	Chris Mason <chris.mason@...ionio.com>,
	Steve French <sfrench@...ba.org>,
	Theodore Ts'o <tytso@....edu>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Miklos Szeredi <miklos@...redi.hu>,
	Anton Altaparmakov <anton@...era.com>,
	Mark Fasheh <mfasheh@...e.com>,
	Joel Becker <jlbec@...lplan.org>, Ben Myers <bpm@....com>,
	Alex Elder <elder@...nel.org>, xfs@....sgi.com,
	Matthew Wilcox <matthew@....cx>,
	Mike Snitzer <snitzer@...hat.com>,
	Alasdair G Kergon <agk@...hat.com>,
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
	linux-ext4@...r.kernel.org, fuse-devel@...ts.sourceforge.net,
	linux-ntfs-dev@...ts.sourceforge.net, ocfs2-devel@....oracle.com,
	linux-mm@...ck.org, Jan Kara <jack@...e.cz>
Subject: Re: [PATCH 2/4] fsfreeze: manage kill signal when sb_start_write is
 called

On Sat, Apr 06, 2013 at 12:04:52PM +0200, Marco Stornelli wrote:
> In every place where sb_start_write was called now we must manage
> the error code and return -EINTR.

Now go and look for callers of mnt_want_write() ;-/  The really
painful one is in do_last(), but kern_path_create() is not much
better; mq_open() would be bad too, had it not been about something
you are not going to freeze anyway...
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