diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2026-05-28 18:31:45 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-06-04 10:28:10 +0200 |
| commit | ac75b922bb67cc8edb52006c9346dc0ca91d04c8 (patch) | |
| tree | 491aa707e9a74fe3094e97b22eadecb2c6282f29 /Documentation | |
| parent | 2911b935825523a71a71eecfe908902d181c041e (diff) | |
buffer: Remove b_end_io
This shrinks buffer_head by 8 bytes, letting us pack more buffer heads
per slab. With a Debian config, it shrinks from 104 bytes to 96 bytes
which is 42 objects per 4KiB page rather than 39, a 7% reduction in the
amount of memory used.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://patch.msgid.link/20260528173150.1093780-33-willy@infradead.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/locking.rst | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst index 8421ea21bd35..a27aca42fd85 100644 --- a/Documentation/filesystems/locking.rst +++ b/Documentation/filesystems/locking.rst @@ -416,20 +416,6 @@ lm_open_conflict yes no no lm_breaker_timedout yes no no ====================== ============= ================= ========= -buffer_head -=========== - -prototypes:: - - void (*b_end_io)(struct buffer_head *bh, int uptodate); - -locking rules: - -called from interrupts. In other words, extreme care is needed here. -bh is locked, but that's all warranties we have here. Currently only RAID1, -highmem, fs/buffer.c, and fs/ntfs/aops.c are providing these. Block devices -call this method upon the IO completion. - block_device_operations ======================= prototypes:: |