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From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>,
	linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	Waiman Long <longman@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
	linux-ext4@vger.kernel.org, cluster-devel@redhat.com,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Naohiro Aota <naohiro.aota@wdc.com>
Subject: Re: [PATCH 01/12] mm: fix a comment in sys_swapon
Date: Wed, 12 Feb 2020 08:37:17 +0100
Message-ID: <20200212073717.GB25555@lst.de> (raw)
In-Reply-To: <20200210152942.2ec4d0b71851feccb7387266@linux-foundation.org>

On Mon, Feb 10, 2020 at 03:29:42PM -0800, Andrew Morton wrote:
> On Tue, 14 Jan 2020 17:12:14 +0100 Christoph Hellwig <hch@lst.de> wrote:
> 
> > claim_swapfile now always takes i_rwsem.
> > 
> > ...
> >
> > --- a/mm/swapfile.c
> > +++ b/mm/swapfile.c
> > @@ -3157,7 +3157,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
> >  	mapping = swap_file->f_mapping;
> >  	inode = mapping->host;
> >  
> > -	/* If S_ISREG(inode->i_mode) will do inode_lock(inode); */
> > +	/* will take i_rwsem; */
> >  	error = claim_swapfile(p, inode);
> >  	if (unlikely(error))
> >  		goto bad_swap;
> 
> http://lkml.kernel.org/r/20200206090132.154869-1-naohiro.aota@wdc.com
> removes this comment altogether.  Please check that this is OK?

Killing it is fine with me.  Just the fact that the comment was wrong
while I did an audit of the area really thew me off.

  reply index

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-14 16:12 RFC: hold i_rwsem until aio completes Christoph Hellwig
2020-01-14 16:12 ` [PATCH 01/12] mm: fix a comment in sys_swapon Christoph Hellwig
2020-02-10 23:29   ` Andrew Morton
2020-02-12  7:37     ` Christoph Hellwig [this message]
2020-01-14 16:12 ` [PATCH 02/12] locking/rwsem: Exit early when held by an anonymous owner Christoph Hellwig
2020-01-14 18:17   ` Waiman Long
2020-01-14 18:25     ` Christoph Hellwig
2020-01-14 18:33       ` Waiman Long
2020-01-14 18:55       ` Waiman Long
2020-01-14 16:12 ` [PATCH 03/12] xfs: fix IOCB_NOWAIT handling in xfs_file_dio_aio_read Christoph Hellwig
2020-01-14 16:12 ` [PATCH 04/12] gfs2: move setting current->backing_dev_info Christoph Hellwig
2020-01-14 16:12 ` [PATCH 05/12] gfs2: fix O_SYNC write handling Christoph Hellwig
2020-02-06 15:31   ` [Cluster-devel] " Andreas Gruenbacher
2020-01-14 16:12 ` [PATCH 06/12] iomap: pass a flags value to iomap_dio_rw Christoph Hellwig
2020-01-14 16:12 ` [PATCH 07/12] iomap: allow holding i_rwsem until aio completion Christoph Hellwig
2020-01-14 16:12 ` [PATCH 08/12] ext4: hold i_rwsem until AIO completes Christoph Hellwig
2020-01-14 21:50   ` Theodore Y. Ts'o
2020-01-15  6:48     ` Christoph Hellwig
2020-01-14 16:12 ` [PATCH 09/12] gfs2: " Christoph Hellwig
2020-01-14 16:12 ` [PATCH 10/12] xfs: " Christoph Hellwig
2020-01-14 16:12 ` [PATCH 11/12] xfs: don't set IOMAP_DIO_SYNCHRONOUS for unaligned I/O Christoph Hellwig
2020-01-14 16:12 ` [PATCH 12/12] iomap: remove the inode_dio_begin/end calls Christoph Hellwig
2020-01-14 18:47 ` RFC: hold i_rwsem until aio completes Matthew Wilcox
2020-01-15  6:54   ` Christoph Hellwig
2020-01-14 19:27 ` Jason Gunthorpe
2020-01-15  6:56   ` Christoph Hellwig
2020-01-15 13:24     ` Jason Gunthorpe
2020-01-15 14:33       ` Peter Zijlstra
2020-01-15 14:49         ` Jason Gunthorpe
2020-01-15 19:03           ` Waiman Long
2020-01-15 19:07             ` Christoph Hellwig
2020-01-18 22:40         ` Matthew Wilcox
2020-01-15 15:36       ` Christoph Hellwig
2020-01-15 16:26         ` Jason Gunthorpe
2020-01-16 14:00 ` Jan Kara
2020-02-03 17:44   ` Christoph Hellwig
2020-01-18  9:28 ` Dave Chinner
2020-02-03 17:46   ` Christoph Hellwig
2020-02-03 23:02     ` Dave Chinner

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