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mm: remove remnants of SPLIT_RSS_COUNTING

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The feature got retired in f1a7941243 ("mm: convert mm's rss stats into
percpu_counter"), but the patch failed to fully clean it up.

Link: https://lkml.kernel.org/r/20230823170556.2281747-1-mjguzik@gmail.com
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Acked-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mateusz Guzik 2023-08-23 19:05:56 +02:00 committed by Andrew Morton
parent 97144ce008
commit bc0c335760
7 changed files with 1 additions and 25 deletions
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2
fs/exec.c
View file

@ -986,8 +986,6 @@ static int exec_mmap(struct mm_struct *mm)
tsk = current;
old_mm = current->mm;
exec_mm_release(tsk, old_mm);
if (old_mm)
sync_mm_rss(old_mm);
ret = down_write_killable(&tsk->signal->exec_update_lock);
if (ret)

8
include/linux/mm.h
View file

@ -2628,14 +2628,6 @@ static inline void setmax_mm_hiwater_rss(unsigned long *maxrss,
*maxrss = hiwater_rss;
}
#if defined(SPLIT_RSS_COUNTING)
void sync_mm_rss(struct mm_struct *mm);
#else
static inline void sync_mm_rss(struct mm_struct *mm)
{
}
#endif
#ifndef CONFIG_ARCH_HAS_PTE_SPECIAL
static inline int pte_special(pte_t pte)
{

4
kernel/exit.c
View file

@ -539,7 +539,6 @@ static void exit_mm(void)
exit_mm_release(current, mm);
if (!mm)
return;
sync_mm_rss(mm);
mmap_read_lock(mm);
mmgrab_lazy_tlb(mm);
BUG_ON(mm != current->active_mm);
@ -829,9 +828,6 @@ void __noreturn do_exit(long code)
io_uring_files_cancel();
exit_signals(tsk); /* sets PF_EXITING */
/* sync mm's RSS info before statistics gathering */
if (tsk->mm)
sync_mm_rss(tsk->mm);
acct_update_integrals(tsk);
group_dead = atomic_dec_and_test(&tsk->signal->live);
if (group_dead) {

4
kernel/fork.c
View file

@ -2406,10 +2406,6 @@ __latent_entropy struct task_struct *copy_process(
p->io_uring = NULL;
#endif
#if defined(SPLIT_RSS_COUNTING)
memset(&p->rss_stat, 0, sizeof(p->rss_stat));
#endif
p->default_timer_slack_ns = current->timer_slack_ns;
#ifdef CONFIG_PSI

1
kernel/kthread.c
View file

@ -1469,7 +1469,6 @@ void kthread_unuse_mm(struct mm_struct *mm)
* clearing tsk->mm.
*/
smp_mb__after_spinlock();
sync_mm_rss(mm);
local_irq_disable();
tsk->mm = NULL;
membarrier_update_current_mm(NULL);

5
mm/madvise.c
View file

@ -746,11 +746,8 @@ static int madvise_free_pte_range(pmd_t *pmd, unsigned long addr,
folio_mark_lazyfree(folio);
}
if (nr_swap) {
if (current->mm == mm)
sync_mm_rss(mm);
if (nr_swap)
add_mm_counter(mm, MM_SWAPENTS, nr_swap);
}
if (start_pte) {
arch_leave_lazy_mmu_mode();
pte_unmap_unlock(start_pte, ptl);

2
mm/memory.c
View file

@ -471,8 +471,6 @@ static inline void add_mm_rss_vec(struct mm_struct *mm, int *rss)
{
int i;
if (current->mm == mm)
sync_mm_rss(mm);
for (i = 0; i < NR_MM_COUNTERS; i++)
if (rss[i])
add_mm_counter(mm, i, rss[i]);