btrfs: reduce size of struct tree_mod_elem

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Several members are used for specific types of tree mod log operations so
they can be placed in a union in order to reduce the structure's size.

This reduces the structure size from 112 bytes to 88 bytes on x86_64,
so we can now use the kmalloc-96 slab instead of the kmalloc-128 slab.

Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Filipe Manana 2025-07-01 23:01:56 +01:00 • committed by David Sterba

parent d30b236a3e

commit aee10fe4e4

1 changed files with 33 additions and 20 deletions

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49

fs/btrfs/tree-mod-log.c

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