diff options
| -rw-r--r-- | mm/damon/core.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/mm/damon/core.c b/mm/damon/core.c index d816679dd7020..00e2997524ece 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -3329,6 +3329,37 @@ static void kdamond_usleep(unsigned long usecs) usleep_range_idle(usecs, usecs + 1); } +#ifdef CONFIG_DAMON_DEBUG_SANITY +static void damon_verify_ctx(struct damon_ctx *c) +{ + struct damon_target *t; + struct damon_region *r; + + damon_for_each_target(t, c) { + struct damon_region *prev_r = NULL; + unsigned int nr_regions = 0; + + damon_for_each_region(r, t) { + WARN_ONCE(r->ar.start >= r->ar.end, + "region start (%lu) >= end (%lu)\n", + r->ar.start, r->ar.end); + WARN_ONCE(prev_r && prev_r->ar.end > r->ar.start, + "region overlap (%lu > %lu)\n", + prev_r->ar.end, r->ar.start); + prev_r = r; + nr_regions++; + } + WARN_ONCE(damon_nr_regions(t) != nr_regions, + "nr_regions mismatch: %u != %u\n", + damon_nr_regions(t), nr_regions); + } +} +#else +static void damon_verify_ctx(struct damon_ctx *c) +{ +} +#endif + /* * kdamond_call() - handle damon_call_control objects. * @ctx: The &struct damon_ctx of the kdamond. @@ -3344,6 +3375,8 @@ static void kdamond_call(struct damon_ctx *ctx, bool cancel) struct damon_call_control *control, *next; LIST_HEAD(controls); + damon_verify_ctx(ctx); + mutex_lock(&ctx->call_controls_lock); list_splice_tail_init(&ctx->call_controls, &controls); mutex_unlock(&ctx->call_controls_lock); |