diff options
| -rw-r--r-- | mm/damon/core.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/mm/damon/core.c b/mm/damon/core.c index 587fb9a4fef8..0bb71e2ab713 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1392,6 +1392,19 @@ int damos_walk(struct damon_ctx *ctx, struct damos_walk_control *control) } /* + * Warn and fix corrupted ->nr_accesses[_bp] for investigations and preventing + * the problem being propagated. + */ +static void damon_warn_fix_nr_accesses_corruption(struct damon_region *r) +{ + if (r->nr_accesses_bp == r->nr_accesses * 10000) + return; + WARN_ONCE(true, "invalid nr_accesses_bp at reset: %u %u\n", + r->nr_accesses_bp, r->nr_accesses); + r->nr_accesses_bp = r->nr_accesses * 10000; +} + +/* * Reset the aggregated monitoring results ('nr_accesses' of each region). */ static void kdamond_reset_aggregated(struct damon_ctx *c) @@ -1404,6 +1417,7 @@ static void kdamond_reset_aggregated(struct damon_ctx *c) damon_for_each_region(r, t) { trace_damon_aggregated(ti, r, damon_nr_regions(t)); + damon_warn_fix_nr_accesses_corruption(r); r->last_nr_accesses = r->nr_accesses; r->nr_accesses = 0; } |