From: Matthew Wilcox <willy@infradead.org>
To: Christoph Hellwig <hch@infradead.org>
Cc: "Darrick J . Wong " <djwong@kernel.org>,
linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
Jens Axboe <axboe@kernel.dk>
Subject: Re: [PATCH v2 04/28] fs: Rename AS_THP_SUPPORT and mapping_thp_support
Date: Mon, 15 Nov 2021 16:03:22 +0000 [thread overview]
Message-ID: <YZKEyrrH4SjqV8W7@casper.infradead.org> (raw)
In-Reply-To: <YYo0L60o7ThqGzlX@infradead.org>
On Tue, Nov 09, 2021 at 12:41:19AM -0800, Christoph Hellwig wrote:
> On Mon, Nov 08, 2021 at 04:05:27AM +0000, Matthew Wilcox (Oracle) wrote:
> > These are now indicators of multi-page folio support, not THP support.
>
> Given that we don't use the large foltio term anywhere else this really
> needs to grow a comment explaining what the flag means.
I think I prefer the term 'large' to 'multi'. What would you think to
this patch (not on top of any particular branch; just to show the scope
of it ...)
+++ b/include/linux/page-flags.h
@@ -692,7 +692,7 @@ static inline bool folio_test_single(struct folio *folio)
return !folio_test_head(folio);
}
-static inline bool folio_test_multi(struct folio *folio)
+static inline bool folio_test_large(struct folio *folio)
{
return folio_test_head(folio);
}
+++ b/mm/filemap.c
@@ -192,9 +192,9 @@ static void filemap_unaccount_folio(struct address_space *mapping,
__lruvec_stat_mod_folio(folio, NR_FILE_PAGES, -nr);
if (folio_test_swapbacked(folio)) {
__lruvec_stat_mod_folio(folio, NR_SHMEM, -nr);
- if (folio_test_multi(folio))
+ if (folio_test_large(folio))
__lruvec_stat_mod_folio(folio, NR_SHMEM_THPS, -nr);
- } else if (folio_test_multi(folio)) {
+ } else if (folio_test_large(folio)) {
__lruvec_stat_mod_folio(folio, NR_FILE_THPS, -nr);
filemap_nr_thps_dec(mapping);
}
@@ -236,7 +236,7 @@ void filemap_free_folio(struct address_space *mapping, struct folio *folio)
if (freepage)
freepage(&folio->page);
- if (folio_test_multi(folio) && !folio_test_hugetlb(folio)) {
+ if (folio_test_large(folio) && !folio_test_hugetlb(folio)) {
folio_ref_sub(folio, folio_nr_pages(folio));
VM_BUG_ON_FOLIO(folio_ref_count(folio) <= 0, folio);
} else {
+++ b/mm/memcontrol.c
@@ -5558,7 +5558,7 @@ static int mem_cgroup_move_account(struct page *page,
VM_BUG_ON(from == to);
VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);
- VM_BUG_ON(compound && !folio_test_multi(folio));
+ VM_BUG_ON(compound && !folio_test_large(folio));
/*
* Prevent mem_cgroup_migrate() from looking at
next prev parent reply other threads:[~2021-11-15 16:03 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-08 4:05 [PATCH v2 00/28] iomap/xfs folio patches Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 01/28] csky,sparc: Declare flush_dcache_folio() Matthew Wilcox (Oracle)
2021-11-09 8:36 ` Christoph Hellwig
2021-11-15 15:54 ` Matthew Wilcox
2021-11-16 6:33 ` Christoph Hellwig
2021-11-16 21:49 ` Matthew Wilcox
2021-11-17 9:52 ` Geert Uytterhoeven
2021-11-08 4:05 ` [PATCH v2 02/28] mm: Add functions to zero portions of a folio Matthew Wilcox (Oracle)
2021-11-09 8:40 ` Christoph Hellwig
2021-11-17 4:45 ` Darrick J. Wong
2021-11-17 14:07 ` Matthew Wilcox
2021-11-17 17:07 ` Darrick J. Wong
2021-11-18 15:55 ` Matthew Wilcox
2021-11-18 17:26 ` Darrick J. Wong
2021-11-18 20:08 ` Matthew Wilcox
2021-11-08 4:05 ` [PATCH v2 03/28] fs: Remove FS_THP_SUPPORT Matthew Wilcox (Oracle)
2021-11-17 4:36 ` Darrick J. Wong
2021-11-08 4:05 ` [PATCH v2 04/28] fs: Rename AS_THP_SUPPORT and mapping_thp_support Matthew Wilcox (Oracle)
2021-11-09 8:41 ` Christoph Hellwig
2021-11-15 16:03 ` Matthew Wilcox [this message]
2021-11-16 6:33 ` Christoph Hellwig
2021-11-08 4:05 ` [PATCH v2 05/28] block: Add bio_add_folio() Matthew Wilcox (Oracle)
2021-11-17 4:48 ` Darrick J. Wong
2021-11-08 4:05 ` [PATCH v2 06/28] block: Add bio_for_each_folio_all() Matthew Wilcox (Oracle)
2021-11-17 4:48 ` Darrick J. Wong
2021-11-08 4:05 ` [PATCH v2 07/28] fs/buffer: Convert __block_write_begin_int() to take a folio Matthew Wilcox (Oracle)
2021-11-09 8:42 ` Christoph Hellwig
2021-11-17 4:35 ` Darrick J. Wong
2021-11-08 4:05 ` [PATCH v2 08/28] iomap: Convert to_iomap_page " Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 09/28] iomap: Convert iomap_page_create " Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 10/28] iomap: Convert iomap_page_release " Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 11/28] iomap: Convert iomap_releasepage to use " Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 12/28] iomap: Add iomap_invalidate_folio Matthew Wilcox (Oracle)
2021-11-17 2:20 ` Darrick J. Wong
2021-11-08 4:05 ` [PATCH v2 13/28] iomap: Pass the iomap_page into iomap_set_range_uptodate Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 14/28] iomap: Convert bio completions to use folios Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 15/28] iomap: Use folio offsets instead of page offsets Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 16/28] iomap: Convert iomap_read_inline_data to take a folio Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 17/28] iomap: Convert readahead and readpage to use " Matthew Wilcox (Oracle)
2021-11-09 8:43 ` Christoph Hellwig
2021-11-08 4:05 ` [PATCH v2 18/28] iomap: Convert iomap_page_mkwrite " Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 19/28] iomap: Convert __iomap_zero_iter " Matthew Wilcox (Oracle)
2021-11-09 8:47 ` Christoph Hellwig
2021-11-17 2:24 ` Darrick J. Wong
2021-11-17 14:20 ` Matthew Wilcox
2021-12-09 21:38 ` Matthew Wilcox
2021-12-10 16:19 ` Matthew Wilcox
2021-12-13 7:34 ` Christoph Hellwig
2021-12-13 18:08 ` Matthew Wilcox
2021-12-16 19:36 ` Darrick J. Wong
2021-12-16 20:43 ` Matthew Wilcox
2021-11-08 4:05 ` [PATCH v2 20/28] iomap: Convert iomap_write_begin() and iomap_write_end() to folios Matthew Wilcox (Oracle)
2021-11-17 4:31 ` Darrick J. Wong
2021-11-17 14:31 ` Matthew Wilcox
2021-11-17 17:10 ` Darrick J. Wong
2021-11-08 4:05 ` [PATCH v2 21/28] iomap: Convert iomap_write_end_inline to take a folio Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 22/28] iomap,xfs: Convert ->discard_page to ->discard_folio Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 23/28] iomap: Simplify iomap_writepage_map() Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 24/28] iomap: Simplify iomap_do_writepage() Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 25/28] iomap: Convert iomap_add_to_ioend() to take a folio Matthew Wilcox (Oracle)
2021-11-17 4:34 ` Darrick J. Wong
2021-11-08 4:05 ` [PATCH v2 26/28] iomap: Convert iomap_migrate_page() to use folios Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 27/28] iomap: Support multi-page folios in invalidatepage Matthew Wilcox (Oracle)
2021-11-08 4:05 ` [PATCH v2 28/28] xfs: Support multi-page folios Matthew Wilcox (Oracle)
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