Commit 6011ee7e authored Sep 17, 2020 by Vinayak Menon

mm: sync rss in speculative page fault path



The speculative page fault path does not sync the
rss in task_struct to mm_struct leading to large
variance in the RSS values observed by userspace
tools and also in the OOM task dump.

Change-Id: Id45f1b9b0a51a9afffbaf8e65f5ef747d409d0d7
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>

parent 1a490661

mm/memory.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -4417,6 +4417,7 @@ int __handle_speculative_fault(struct mm_struct *mm, unsigned long address,
		* If there is no need to retry, don't return the vma to the caller.
		*/
		if (ret != VM_FAULT_RETRY) {
		check_sync_rss_stat(current);
		if (vma_is_anonymous(vmf.vma))
		count_vm_event(SPECULATIVE_PGFAULT_ANON);
		else