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lmkd: Add hook for when there are no killable processes am: d256df3c5f am: 1683221f0d 

Original change: https://android-review.googlesource.com/c/platform/system/memory/lmkd/+/3249594

Change-Id: Ica82748265304f240cff3e2dc570fa12e9db4ac1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
David Stevens 2024-08-29 15:50:21 +00:00 committed by Automerger Merge Worker
parent a54cb7c846 1683221f0d
commit 7dff130d87
2 changed files with 10 additions and 0 deletions
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6
include/lmkd_hooks.h
View File

@ -50,6 +50,11 @@ bool lmkd_init_hook();
*/
int lmkd_free_memory_before_kill_hook(struct proc* procp, int proc_size_pages,
int proc_oom_score, int kill_reason);
/*
* Invoked when LMKD has no more candidates to kill at any priority. The hook
* may attempt to free memory elsewhere to try to preserve system stability.
*/
void lmkd_no_kill_candidates_hook();
#else /* LMKD_USE_HOOKS */
@ -59,6 +64,7 @@ static inline int lmkd_free_memory_before_kill_hook(struct proc*, int, int,
int) {
return 0;
}
static inline void lmkd_no_kill_candidates_hook() {}
#endif /* LMKD_USE_HOOKS */

4
lmkd.cpp
View File

@ -3248,6 +3248,10 @@ do_kill:
pages_freed = find_and_kill_process(min_score_adj, NULL, &mi, &wi, &curr_tm, NULL);
if (pages_freed == 0 && min_score_adj == 0) {
lmkd_no_kill_candidates_hook();
}
if (pages_freed == 0) {
/* Rate limit kill reports when nothing was reclaimed */
if (get_time_diff_ms(&last_report_tm, &curr_tm) < FAIL_REPORT_RLIMIT_MS) {