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Tue, 08 Sep 2026 23:10:55 -0700 (PDT) Message-ID: Date: Wed, 9 Sep 2026 15:40:47 +0930 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/7] btrfs: convert some struct page users to folios To: Tal Zussman , David Sterba , Chris Mason Cc: "Matthew Wilcox (Oracle)" , linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260907-btrfs-folio-conversions-v2-0-b5fe79f7607b@columbia.edu> Content-Language: en-US From: Qu Wenruo Autocrypt: addr=wqu@suse.com; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAHNGFF1IFdlbnJ1byA8d3F1QHN1c2UuY29tPsLAlAQTAQgAPgIbAwULCQgHAgYVCAkKCwIE FgIDAQIeAQIXgBYhBC3fcuWlpVuonapC4cI9kfOhJf6oBQJnEXVgBQkQ/lqxAAoJEMI9kfOh Jf6o+jIH/2KhFmyOw4XWAYbnnijuYqb/obGae8HhcJO2KIGcxbsinK+KQFTSZnkFxnbsQ+VY fvtWBHGt8WfHcNmfjdejmy9si2jyy8smQV2jiB60a8iqQXGmsrkuR+AM2V360oEbMF3gVvim 2VSX2IiW9KERuhifjseNV1HLk0SHw5NnXiWh1THTqtvFFY+CwnLN2GqiMaSLF6gATW05/sEd V17MdI1z4+WSk7D57FlLjp50F3ow2WJtXwG8yG8d6S40dytZpH9iFuk12Sbg7lrtQxPPOIEU rpmZLfCNJJoZj603613w/M8EiZw6MohzikTWcFc55RLYJPBWQ+9puZtx1DopW2jOwE0EWdWB rwEIAKpT62HgSzL9zwGe+WIUCMB+nOEjXAfvoUPUwk+YCEDcOdfkkM5FyBoJs8TCEuPXGXBO Cl5P5B8OYYnkHkGWutAVlUTV8KESOIm/KJIA7jJA+Ss9VhMjtePfgWexw+P8itFRSRrrwyUf E+0WcAevblUi45LjWWZgpg3A80tHP0iToOZ5MbdYk7YFBE29cDSleskfV80ZKxFv6koQocq0 vXzTfHvXNDELAuH7Ms/WJcdUzmPyBf3Oq6mKBBH8J6XZc9LjjNZwNbyvsHSrV5bgmu/THX2n g/3be+iqf6OggCiy3I1NSMJ5KtR0q2H2Nx2Vqb1fYPOID8McMV9Ll6rh8S8AEQEAAcLAfAQY AQgAJgIbDBYhBC3fcuWlpVuonapC4cI9kfOhJf6oBQJnEXWBBQkQ/lrSAAoJEMI9kfOhJf6o cakH+QHwDszsoYvmrNq36MFGgvAHRjdlrHRBa4A1V1kzd4kOUokongcrOOgHY9yfglcvZqlJ qfa4l+1oxs1BvCi29psteQTtw+memmcGruKi+YHD7793zNCMtAtYidDmQ2pWaLfqSaryjlzR /3tBWMyvIeWZKURnZbBzWRREB7iWxEbZ014B3gICqZPDRwwitHpH8Om3eZr7ygZck6bBa4MU o1XgbZcspyCGqu1xF/bMAY2iCDcq6ULKQceuKkbeQ8qxvt9hVxJC2W3lHq8dlK1pkHPDg9wO JoAXek8MF37R8gpLoGWl41FIUb3hFiu3zhDDvslYM4BmzI18QgQTQnotJH8= In-Reply-To: <20260907-btrfs-folio-conversions-v2-0-b5fe79f7607b@columbia.edu> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 在 2026/9/8 05:49, Tal Zussman 写道: > This series converts three areas of btrfs that still use struct page: > > 1. The extent-io tests. test_find_delalloc() uses the page APIs, and the > extent buffer memory checks assume one page per folio. > > 2. Compression. btrfs_compr_pool_scan() walks the folio pool as struct > page, the last use of page->lru in btrfs, and the heuristic sampler > is the last caller of find_get_page(). > > 3. Super block reads. btrfs_read_disk_super() and the zoned super block > log comparison are the last page cache lookups by page in btrfs. > > Tested with KASAN, lockdep, DEBUG_VM and the btrfs selftests enabled. > xfstests' compress group under compress=zstd and the btrfs group both > pass. Now pushed to for-next branch. Thanks, Qu > > --- > Changes in v2: > - Add tags (Thanks Qu!) > - Patch 2: Assert that test_find_delalloc()'s folios are order-0, per Qu > - Drop the v1 free space cache patches (8-10), per Qu. The v1 space > cache will be removed instead > - Link to v1: https://patch.msgid.link/20260906-btrfs-folio-conversions-v1-0-834b9d7b06f5@columbia.edu > > --- > Tal Zussman (7): > btrfs: tests: rename process_page_range() to process_folio_range() > btrfs: tests: convert test_find_delalloc() to use folios > btrfs: tests: use eb folio helpers in extent buffer memory checks > btrfs: convert btrfs_compr_pool_scan() to use folios > btrfs: convert heuristic_collect_sample() to use folios > btrfs: fix stale function references in compression comments > btrfs: use folios for reading super blocks from the block device > > fs/btrfs/compression.c | 20 +++--- > fs/btrfs/tests/extent-io-tests.c | 131 +++++++++++++++++++++------------------ > fs/btrfs/volumes.c | 16 +++-- > fs/btrfs/zoned.c | 12 ++-- > 4 files changed, 93 insertions(+), 86 deletions(-) > --- > base-commit: 69b26c13e520480d1869171e2c2b8a59f0c857ec > change-id: 20260905-btrfs-folio-conversions-47950cc1faca > > Best regards, > -- > Tal Zussman