The patch titled
Subject: ratelimit: convert flags to int to save 8 bytes in size
has been added to the -mm mm-nonmm-unstable branch. Its filename is
ratelimit-convert-flags-to-int-to-save-8-bytes-in-size.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ratelimit-convert-flags-to-int-to-save-8-bytes-in-size.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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From: Mateusz Guzik <mjguzik@xxxxxxxxx>
Subject: ratelimit: convert flags to int to save 8 bytes in size
Date: Sat, 17 Aug 2024 14:37:54 +0200
Only bit 1 is used, making an unsigned long a total overkill.
This brings it from 40 to 32 bytes, which in turn shrinks user_struct from
136 to 128 bytes. Since the latter is allocated with hwalign, this means
the total usage goes down from 192 to 128 bytes per object.
No functional changes.
Link: https://lkml.kernel.org/r/20240817123754.240924-1-mjguzik@xxxxxxxxx
Signed-off-by: Mateusz Guzik <mjguzik@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/ratelimit_types.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/linux/ratelimit_types.h~ratelimit-convert-flags-to-int-to-save-8-bytes-in-size
+++ a/include/linux/ratelimit_types.h
@@ -19,8 +19,8 @@ struct ratelimit_state {
int burst;
int printed;
int missed;
+ unsigned int flags;
unsigned long begin;
- unsigned long flags;
};
#define RATELIMIT_STATE_INIT_FLAGS(name, interval_init, burst_init, flags_init) { \
_
Patches currently in -mm which might be from mjguzik@xxxxxxxxx are
ratelimit-convert-flags-to-int-to-save-8-bytes-in-size.patch
