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From: Christoph Hellwig <hch@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
	linux-xfs@vger.kernel.org, Ted Tso <tytso@mit.edu>,
	Christoph Hellwig <hch@infradead.org>,
	Amir Goldstein <amir73il@gmail.com>,
	Dave Chinner <david@fromorbit.com>
Subject: Re: [PATCH 5/7] xfs: Convert to use i_mapping_sem
Date: Tue, 13 Apr 2021 14:05:12 +0100	[thread overview]
Message-ID: <20210413130512.GC1366579@infradead.org> (raw)
In-Reply-To: <20210413112859.32249-5-jack@suse.cz>

On Tue, Apr 13, 2021 at 01:28:49PM +0200, Jan Kara wrote:
> Use i_mapping_sem instead of XFS internal i_mmap_lock. The intended
> purpose of i_mapping_sem is exactly the same.

Might be worth mentioning here that the locking in __xfs_filemap_fault
changes because filemap_fault already takes i_mapping_sem?

>   * mmap_lock (MM)
>   *   sb_start_pagefault(vfs, freeze)
> - *     i_mmaplock (XFS - truncate serialisation)
> + *     i_mapping_sem (XFS - truncate serialisation)

This is sort of VFS now, isn't it?

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>

  reply	other threads:[~2021-04-13 13:06 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-13 11:28 [PATCH 0/7 RFC v3] fs: Hole punch vs page cache filling races Jan Kara
2021-04-13 11:28 ` [PATCH 1/7] mm: Fix comments mentioning i_mutex Jan Kara
2021-04-13 12:38   ` Christoph Hellwig
2021-04-13 11:28 ` [PATCH 2/7] mm: Protect operations adding pages to page cache with i_mapping_lock Jan Kara
2021-04-13 12:57   ` Christoph Hellwig
2021-04-13 13:56     ` Jan Kara
2021-04-14  0:01   ` Dave Chinner
2021-04-14 12:23     ` Jan Kara
2021-04-14 21:57       ` Dave Chinner
2021-04-15 13:11         ` Jan Kara
2021-04-14 22:25     ` Matthew Wilcox
2021-04-15  2:05       ` Dave Chinner
2021-04-13 11:28 ` [PATCH 3/7] ext4: Convert to use inode->i_mapping_sem Jan Kara
2021-04-13 11:28 ` [PATCH 4/7] ext2: Convert to using i_mapping_sem Jan Kara
2021-04-13 11:28 ` [PATCH 5/7] xfs: Convert to use i_mapping_sem Jan Kara
2021-04-13 13:05   ` Christoph Hellwig [this message]
2021-04-13 13:42     ` Jan Kara
2021-04-13 11:28 ` [PATCH 6/7] zonefs: Convert to using i_mapping_sem Jan Kara
2021-04-13 11:28 ` [PATCH 7/7] fs: Remove i_mapping_sem protection from .page_mkwrite handlers Jan Kara
2021-04-13 13:09 ` [PATCH 0/7 RFC v3] fs: Hole punch vs page cache filling races Christoph Hellwig
2021-04-13 14:17   ` Jan Kara
2021-04-19 15:20 ` Matthew Wilcox
2021-04-19 16:25   ` Jan Kara
2021-04-20 22:12   ` Dave Chinner

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