diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2025-08-12 12:39:01 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-08-15 13:12:59 +0200 |
| commit | 1ea3e3b0dadc06c5e6c1bdf5312e70ee861b1ba0 (patch) | |
| tree | 2b8073793c4b3fe48b9240df54e5c3783fb226cd /kernel | |
| parent | perf: Split out mlock limit handling (diff) | |
| download | linux-1ea3e3b0dadc06c5e6c1bdf5312e70ee861b1ba0.tar.gz linux-1ea3e3b0dadc06c5e6c1bdf5312e70ee861b1ba0.zip | |
perf: Split out VM accounting
Similarly to the mlock limit calculation the VM accounting is required for
both the ringbuffer and the AUX buffer allocations.
To prepare for splitting them out into separate functions, move the
accounting into a helper function.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Link: https://lore.kernel.org/r/20250812104018.660347811@infradead.org
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/events/core.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index f6299012ed73..f90847101ade 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -6962,10 +6962,17 @@ static bool perf_mmap_calc_limits(struct vm_area_struct *vma, long *user_extra, return locked <= lock_limit || !perf_is_paranoid() || capable(CAP_IPC_LOCK); } +static void perf_mmap_account(struct vm_area_struct *vma, long user_extra, long extra) +{ + struct user_struct *user = current_user(); + + atomic_long_add(user_extra, &user->locked_vm); + atomic64_add(extra, &vma->vm_mm->pinned_vm); +} + static int perf_mmap(struct file *file, struct vm_area_struct *vma) { struct perf_event *event = file->private_data; - struct user_struct *user = current_user(); unsigned long vma_size, nr_pages; long user_extra = 0, extra = 0; struct mutex *aux_mutex = NULL; @@ -7136,9 +7143,7 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma) unlock: if (!ret) { - atomic_long_add(user_extra, &user->locked_vm); - atomic64_add(extra, &vma->vm_mm->pinned_vm); - + perf_mmap_account(vma, user_extra, extra); atomic_inc(&event->mmap_count); } else if (rb) { /* AUX allocation failed */ |