user.c: #ifdef ->mq_bytes
PATCH 3/3 user.c: #ifdef ->mq_bytes
for those who deselect POSIX message queues.
Reduces SLAB size of user_struct from 64 to 32 bytes here, SLUB size -- from 40 bytes to 32 bytes.
---
include/linux/sched.h | 2 ++ kernel/user.c | 2 -- 2 files changed, 2 insertions(+), 2 deletions(-)
include/linux/sched.h +2 -0
@@ -583,8 +583,10 @@ struct user_struct {atomic_t inotify_watches;/* How many inotify watches does this user have? */ atomic_t inotify_devs;/* How many inotify devs does this user have opened? */ #endif +#ifdef CONFIG_POSIX_MQUEUE /* protected by mq_lock */ unsigned long mq_bytes;/* How many bytes can be allocated to mqueue? */ +#endif unsigned long locked_shm;/* How many pages of mlocked shm ? */ #ifdef CONFIG_KEYS
kernel/user.c +0 -1
@@ -44,7 +44,6 @@ struct user_struct root_user = { .processes = ATOMIC_INIT(1), .files = ATOMIC_INIT(0), .sigpending = ATOMIC_INIT(0), - .mq_bytes = 0, .locked_shm =0 , #ifdef CONFIG_KEYS .uid_keyring = &root_user_keyring,
Hello Alexey !
Quoted 15 lines · Alexey Dobriyan
for those who deselect POSIX message queues.
Reduces SLAB size of
user_structfrom 64 to 32 bytes here, SLUB size -- from 40 bytes to 32 bytes.Signed-off-by Alexey Dobriyan <[email protected]>---
include/linux/sched.h | 2 ++ kernel/user.c | 2 -- 2 files changed, 2 insertions(+), 2 deletions(-)
include/linux/sched.h struct user_struct { · line 590
Quoted 8 lines
include/linux/sched.h +2
-0@@ -583,8 +583,10 @@ struct user_struct {atomic_t inotify_watches;/* How many inotify watches does this user have? */ atomic_t inotify_devs;/* How many inotify devs does this user have opened? */ #endif +#ifdef CONFIG_POSIX_MQUEUE /* protected by mq_lock */ unsigned long mq_bytes;/* How many bytes can be allocated to mqueue? */ +#endif unsigned long locked_shm;/* How many pages of mlocked shm ? */
while you are it, it seems possible to #ifdef locked_shm also. it's a bit more complex because the code is mm/ and there are some links with the hugetlbfs also.
Cheers,
C.
Quoted 18 lines
include/linux/sched.h +0
-0#ifdef CONFIG_KEYS kernel/user.c +0
-2@@ -44,7 +44,6 @@ struct user_struct root_user = { .processes = ATOMIC_INIT(1), .files = ATOMIC_INIT(0), .sigpending = ATOMIC_INIT(0), - .mq_bytes = 0, .locked_shm =0 , #ifdef CONFIG_KEYS .uid_keyring = &root_user_keyring, -To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected]
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