Re: [PATCH v2 00/10] Use generic_file_read_iter() in hugetlbfs

[Usama Arif <usama.arif@linux.dev>]

On Thu,  9 Jul 2026 19:47:28 +0100 "Matthew Wilcox (Oracle)" <willy@infradead.org> wrote:

> This set of patches are separated out from Jane's earlier series.
> https://lore.kernel.org/linux-mm/20260617172534.1740152-1-jane.chu@oracle.com/
> 
> There's enough potentially controversial things in here that I think
> it's worth considering them by themselves.  First, handling hwpoison
> in filemap_read().  I want this for shmem as well as for hugetlbfs (a
> later patchset, maybe).  Second, handling misses in the pagecache as
> holes rather than opportunities to populate the pagecache.
> 
> v1 here: https://lore.kernel.org/linux-mm/20260707181713.208282-1-willy@infradead.org/
> Sashiko had a lot of valuable feedback on that, and that's all addressed
> here except for the things that I don't think are relevant.
> 
> Jane Chu (2):
>   filemap: Add hwpoison handling to filemap_read()
>   hugetlb: replace hugetlbfs_read_iter() with generic_file_read_iter()
> 
> Matthew Wilcox (Oracle) (8):
>   mm: Rename folio_contain_hwpoison_page() to folio_has_hwpoison_page()
>   hugetlb: Mark some function arguments as const
>   filemap: Remove checks in mapping_set_folio_order_range()
>   hugetlb: Set mapping folio order
>   memory-failure: Remove raw_hwp_list_head()
>   memory-failure: Prevent UAF in raw_hwp_page list
>   mm: Handle hugetlb correctly in is_page_hwpoison()
>   filemap: Add support for authoritative mappings
> 
>  fs/hugetlbfs/inode.c       | 122 ++++---------------------------------

I really like the deletions here in hugetlbfs :)

>  include/linux/hugetlb.h    |  24 +++-----
>  include/linux/mm_types.h   |   4 +-
>  include/linux/page-flags.h |  28 ++++++---
>  include/linux/pagemap.h    |  32 +++++-----
>  mm/filemap.c               |  46 +++++++++++++-
>  mm/huge_memory.c           |   2 +-
>  mm/hugetlb.c               |   2 +-
>  mm/memory-failure.c        |  39 ++++++------
>  mm/memory_hotplug.c        |   2 +-
>  mm/shmem.c                 |   2 +-
>  mm/vmscan.c                |   2 +-
>  12 files changed, 128 insertions(+), 177 deletions(-)
> 
> -- 
> 2.47.3
> 
>