From: Christoph Hellwig <hch@infradead.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-ext4@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net, linux-mm@kvack.org,
linux-nilfs@vger.kernel.org
Subject: Re: [PATCH 03/10] ext4: Convert mpage_release_unused_pages() to use filemap_get_folios()
Date: Wed, 8 Jun 2022 20:55:06 -0700 [thread overview]
Message-ID: <YqFvGgKTyGPxStkx@infradead.org> (raw)
In-Reply-To: <YqDIIH2d7iu1o7D0@casper.infradead.org>
On Wed, Jun 08, 2022 at 05:02:40PM +0100, Matthew Wilcox wrote:
> On Wed, Jun 08, 2022 at 01:02:22AM -0700, Christoph Hellwig wrote:
> > On Sun, Jun 05, 2022 at 08:38:47PM +0100, Matthew Wilcox (Oracle) wrote:
> > > If the folio is large, it may overlap the beginning or end of the
> > > unused range. If it does, we need to avoid invalidating it.
> >
> > It's never going to be larger for ext4, is it? But either way,
> > those precautions looks fine.
>
> I don't want to say "never". Today, it's not, but if ext4 ever does
> gain support for large folios, then this is a precaution it will need
> to take. I'm trying not to leave traps when I do conversions.
FYI, this wasn't an objection to the patch, just a hint that the commit
log could spell this out a bit better.
next prev parent reply other threads:[~2022-06-09 3:55 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-05 19:38 [PATCH 00/10] Convert to filemap_get_folios() Matthew Wilcox (Oracle)
2022-06-05 19:38 ` [PATCH 01/10] filemap: Add filemap_get_folios() Matthew Wilcox (Oracle)
2022-06-08 8:00 ` Christoph Hellwig
2022-06-05 19:38 ` [PATCH 02/10] buffer: Convert clean_bdev_aliases() to use filemap_get_folios() Matthew Wilcox (Oracle)
2022-06-08 8:01 ` Christoph Hellwig
2022-06-05 19:38 ` [PATCH 03/10] ext4: Convert mpage_release_unused_pages() " Matthew Wilcox (Oracle)
2022-06-08 8:02 ` Christoph Hellwig
2022-06-08 16:02 ` Matthew Wilcox
2022-06-09 3:55 ` Christoph Hellwig [this message]
2022-06-05 19:38 ` [PATCH 04/10] ext4: Convert mpage_map_and_submit_buffers() " Matthew Wilcox (Oracle)
2022-06-08 8:03 ` Christoph Hellwig
2022-06-05 19:38 ` [PATCH 05/10] f2fs: Convert f2fs_invalidate_compress_pages() " Matthew Wilcox (Oracle)
2022-06-08 8:03 ` Christoph Hellwig
2022-06-15 8:14 ` [f2fs-dev] " Chao Yu
2022-06-05 19:38 ` [PATCH 06/10] hugetlbfs: Convert remove_inode_hugepages() " Matthew Wilcox (Oracle)
2022-06-08 8:04 ` Christoph Hellwig
2022-06-10 15:52 ` Sumanth Korikkar
2022-06-10 18:35 ` Gerald Schaefer
2022-06-10 21:17 ` Matthew Wilcox
2022-06-10 21:56 ` Mike Kravetz
2022-06-13 6:56 ` Sumanth Korikkar
2022-06-05 19:38 ` [PATCH 07/10] nilfs2: Convert nilfs_copy_back_pages() " Matthew Wilcox (Oracle)
2022-06-07 16:10 ` Ryusuke Konishi
2022-06-08 8:04 ` Christoph Hellwig
2022-06-05 19:38 ` [PATCH 08/10] vmscan: Add check_move_unevictable_folios() Matthew Wilcox (Oracle)
2022-06-08 8:07 ` Christoph Hellwig
2022-06-08 16:32 ` Matthew Wilcox
2022-06-09 3:56 ` Christoph Hellwig
2022-06-08 15:33 ` [vmscan] bc9eb0d5ef: BUG:KASAN:stack-out-of-bounds_in_check_move_unevictable_pages kernel test robot
2022-06-05 19:38 ` [PATCH 09/10] shmem: Convert shmem_unlock_mapping() to use filemap_get_folios() Matthew Wilcox (Oracle)
2022-06-08 8:08 ` Christoph Hellwig
2022-06-05 19:38 ` [PATCH 10/10] filemap: Remove find_get_pages_range() and associated functions Matthew Wilcox (Oracle)
2022-06-08 8:08 ` Christoph Hellwig
2022-06-07 11:37 ` [PATCH 00/10] Convert to filemap_get_folios() Christian Brauner
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