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| author | Ryan Roberts <ryan.roberts@arm.com> | 2025-06-09 12:27:25 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-10 08:42:03 +0300 |
| commit | f5e8b140cd1324cf2c9c17487b8f444098624797 (patch) | |
| tree | 5e7f9b614324c75276f51098af09fdc4726e8b05 /include/linux | |
| parent | 18ebe55a9236b33d519fcc8669730cd02386a2dc (diff) | |
| download | linux-f5e8b140cd1324cf2c9c17487b8f444098624797.tar.xz | |
mm/readahead: make space in struct file_ra_state
We need to be able to store the preferred folio order associated with a
readahead request in the struct file_ra_state so that we can more
accurately increase the order across subsequent readahead requests. But
struct file_ra_state is per-struct file, so we don't really want to
increase it's size.
mmap_miss is currently 32 bits but it is only counted up to 10 *
MMAP_LOTSAMISS, which is currently defined as 1000. So 16 bits should be
plenty. Redefine it to unsigned short, making room for order as unsigned
short in follow up commit.
Link: https://lkml.kernel.org/r/20250609092729.274960-4-ryan.roberts@arm.com
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Chaitanya S Prakash <chaitanyas.prakash@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fs.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 62634af97da6..ef819b232d66 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1054,7 +1054,7 @@ struct file_ra_state { unsigned int size; unsigned int async_size; unsigned int ra_pages; - unsigned int mmap_miss; + unsigned short mmap_miss; loff_t prev_pos; }; |