Re: [PATCH v2 0/7] btrfs: convert some struct page users to folios

[Qu Wenruo <wqu@suse.com>]

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 <tz2294@columbia.edu>