From: Matthew Wilcox <willy@infradead.org>
To: Ritesh Harjani <ritesh.list@gmail.com>
Cc: Theodore Tso <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 25/31] ext4: Convert ext4_block_write_begin() to take a folio
Date: Wed, 15 Mar 2023 04:40:47 +0000 [thread overview]
Message-ID: <ZBFMT6L0QqpDcWNm@casper.infradead.org> (raw)
In-Reply-To: <87r0u129di.fsf@doe.com>
On Mon, Mar 06, 2023 at 08:51:45PM +0530, Ritesh Harjani wrote:
> Matthew Wilcox <willy@infradead.org> writes:
>
> > On Mon, Mar 06, 2023 at 12:21:48PM +0530, Ritesh Harjani wrote:
> >> "Matthew Wilcox (Oracle)" <willy@infradead.org> writes:
> >>
> >> > All the callers now have a folio, so pass that in and operate on folios.
> >> > Removes four calls to compound_head().
> >>
> >> Why do you say four? Isn't it 3 calls of PageUptodate(page) which
> >> removes calls to compound_head()? Which one did I miss?
> >>
> >> > - BUG_ON(!PageLocked(page));
> >> > + BUG_ON(!folio_test_locked(folio));
> >
> > That one ;-)
>
> __PAGEFLAG(Locked, locked, PF_NO_TAIL)
>
> #define __PAGEFLAG(uname, lname, policy) \
> TESTPAGEFLAG(uname, lname, policy) \
> __SETPAGEFLAG(uname, lname, policy) \
> __CLEARPAGEFLAG(uname, lname, policy)
>
> #define TESTPAGEFLAG(uname, lname, policy) \
> static __always_inline bool folio_test_##lname(struct folio *folio) \
> { return test_bit(PG_##lname, folio_flags(folio, FOLIO_##policy)); } \
> static __always_inline int Page##uname(struct page *page) \
> { return test_bit(PG_##lname, &policy(page, 0)->flags); }
>
> How? PageLocked(page) doesn't do any compount_head() calls no?
You missed one piece of the definition ...
#define PF_NO_TAIL(page, enforce) ({ \
VM_BUG_ON_PGFLAGS(enforce && PageTail(page), page); \
PF_POISONED_CHECK(compound_head(page)); })
next prev parent reply other threads:[~2023-03-15 4:41 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-26 20:23 [PATCH 00/31] Convert most of ext4 to folios Matthew Wilcox (Oracle)
2023-01-26 20:23 ` [PATCH 01/31] fs: Add FGP_WRITEBEGIN Matthew Wilcox (Oracle)
2023-03-05 8:53 ` Ritesh Harjani
2023-03-14 22:00 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 02/31] fscrypt: Add some folio helper functions Matthew Wilcox (Oracle)
2023-01-27 3:02 ` Eric Biggers
2023-01-27 16:13 ` Matthew Wilcox
2023-01-27 16:21 ` Eric Biggers
2023-01-27 16:37 ` Matthew Wilcox
2023-03-14 22:05 ` Theodore Ts'o
2023-03-14 23:12 ` Eric Biggers
2023-03-15 2:53 ` Theodore Ts'o
2023-03-05 9:06 ` Ritesh Harjani
2023-01-26 20:23 ` [PATCH 03/31] ext4: Convert ext4_bio_write_page() to use a folio Matthew Wilcox (Oracle)
2023-01-28 16:53 ` kernel test robot
2023-01-28 19:07 ` kernel test robot
2023-03-05 11:18 ` Ritesh Harjani
2023-03-14 22:07 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 04/31] ext4: Convert ext4_finish_bio() to use folios Matthew Wilcox (Oracle)
2023-03-06 9:10 ` Ritesh Harjani
2023-03-23 3:26 ` Matthew Wilcox
2023-03-23 14:51 ` Darrick J. Wong
2023-03-23 15:30 ` Matthew Wilcox
2023-03-27 0:58 ` Christoph Hellwig
2023-03-27 0:57 ` Christoph Hellwig
2023-03-14 22:08 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 05/31] ext4: Convert ext4_writepage() to use a folio Matthew Wilcox (Oracle)
2023-03-06 18:45 ` Ritesh Harjani
2023-03-14 22:26 ` Theodore Ts'o
2023-03-23 3:29 ` Matthew Wilcox
2023-01-26 20:23 ` [PATCH 06/31] ext4: Turn mpage_process_page() into mpage_process_folio() Matthew Wilcox (Oracle)
2023-03-14 22:27 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 07/31] ext4: Convert mpage_submit_page() to mpage_submit_folio() Matthew Wilcox (Oracle)
2023-03-14 22:28 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 08/31] ext4: Convert ext4_bio_write_page() to ext4_bio_write_folio() Matthew Wilcox (Oracle)
2023-03-14 22:31 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 09/31] ext4: Convert ext4_readpage_inline() to take a folio Matthew Wilcox (Oracle)
2023-03-14 22:31 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 10/31] ext4: Convert ext4_convert_inline_data_to_extent() to use " Matthew Wilcox (Oracle)
2023-03-14 22:36 ` Theodore Ts'o
2023-03-23 17:14 ` Matthew Wilcox
2023-01-26 20:23 ` [PATCH 11/31] ext4: Convert ext4_try_to_write_inline_data() " Matthew Wilcox (Oracle)
2023-03-14 22:37 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 12/31] ext4: Convert ext4_da_convert_inline_data_to_extent() " Matthew Wilcox (Oracle)
2023-01-26 20:23 ` [PATCH 13/31] ext4: Convert ext4_da_write_inline_data_begin() " Matthew Wilcox (Oracle)
2023-01-26 20:23 ` [PATCH 14/31] ext4: Convert ext4_read_inline_page() to ext4_read_inline_folio() Matthew Wilcox (Oracle)
2023-03-14 22:38 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 15/31] ext4: Convert ext4_write_inline_data_end() to use a folio Matthew Wilcox (Oracle)
2023-03-14 22:39 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 16/31] ext4: Convert ext4_write_begin() " Matthew Wilcox (Oracle)
2023-03-14 22:40 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 17/31] ext4: Convert ext4_write_end() " Matthew Wilcox (Oracle)
2023-03-14 22:41 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 18/31] ext4: Use a folio in ext4_journalled_write_end() Matthew Wilcox (Oracle)
2023-03-14 22:41 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 19/31] ext4: Convert ext4_journalled_zero_new_buffers() to use a folio Matthew Wilcox (Oracle)
2023-03-14 22:46 ` Theodore Ts'o
2023-03-24 4:15 ` Matthew Wilcox
2023-01-26 20:24 ` [PATCH 20/31] ext4: Convert __ext4_block_zero_page_range() " Matthew Wilcox (Oracle)
2023-03-05 12:26 ` Ritesh Harjani
2023-01-26 20:24 ` [PATCH 21/31] ext4: Convert __ext4_journalled_writepage() to take " Matthew Wilcox (Oracle)
2023-03-14 22:47 ` Theodore Ts'o
2023-03-24 4:55 ` Matthew Wilcox
2023-01-26 20:24 ` [PATCH 22/31] ext4: Convert ext4_page_nomap_can_writeout() " Matthew Wilcox (Oracle)
2023-03-14 22:50 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 23/31] ext4: Use a folio in ext4_da_write_begin() Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 24/31] ext4: Convert ext4_mpage_readpages() to work on folios Matthew Wilcox (Oracle)
2023-01-27 4:15 ` Eric Biggers
2023-01-27 16:08 ` Matthew Wilcox
2023-03-05 11:26 ` Ritesh Harjani
2023-01-26 20:24 ` [PATCH 25/31] ext4: Convert ext4_block_write_begin() to take a folio Matthew Wilcox (Oracle)
2023-03-06 6:51 ` Ritesh Harjani
2023-03-06 8:27 ` Matthew Wilcox
2023-03-06 15:21 ` Ritesh Harjani
2023-03-15 4:40 ` Matthew Wilcox [this message]
2023-03-15 14:57 ` Ritesh Harjani
2023-01-26 20:24 ` [PATCH 26/31] ext4: Convert ext4_writepage() " Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 27/31] ext4: Use a folio in ext4_page_mkwrite() Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 28/31] ext4: Use a folio iterator in __read_end_io() Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 29/31] ext4: Convert mext_page_mkuptodate() to take a folio Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 30/31] ext4: Convert pagecache_read() to use " Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 31/31] ext4: Use a folio in ext4_read_merkle_tree_page Matthew Wilcox (Oracle)
2023-03-15 17:57 ` [PATCH 00/31] Convert most of ext4 to folios Theodore Ts'o
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