diff options
| -rw-r--r-- | fs/f2fs/checkpoint.c | 7 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 8 |
2 files changed, 14 insertions, 1 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index db3831f7f2f5..02806e2edce4 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -1778,6 +1778,7 @@ static void __checkpoint_and_complete_reqs(struct f2fs_sb_info *sbi) llist_for_each_entry_safe(req, next, dispatch_list, llnode) { diff = (u64)ktime_ms_delta(ktime_get(), req->queue_time); req->ret = ret; + req->delta_time = diff; complete(&req->wait); sum_diff += diff; @@ -1873,6 +1874,12 @@ int f2fs_issue_checkpoint(struct f2fs_sb_info *sbi) else flush_remained_ckpt_reqs(sbi, &req); + if (unlikely(req.delta_time >= CP_LONG_LATENCY_THRESHOLD)) { + f2fs_warn_ratelimited(sbi, + "blocked on checkpoint for %u ms", cprc->peak_time); + dump_stack(); + } + return req.ret; } diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 46be7560548c..7b567ab953e4 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -334,7 +334,10 @@ struct ckpt_req { struct completion wait; /* completion for checkpoint done */ struct llist_node llnode; /* llist_node to be linked in wait queue */ int ret; /* return code of checkpoint */ - ktime_t queue_time; /* request queued time */ + union { + ktime_t queue_time; /* request queued time */ + ktime_t delta_time; /* time in queue */ + }; }; struct ckpt_req_control { @@ -350,6 +353,9 @@ struct ckpt_req_control { unsigned int peak_time; /* peak wait time in msec until now */ }; +/* a time threshold that checkpoint was blocked for, unit: ms */ +#define CP_LONG_LATENCY_THRESHOLD 5000 + /* for the bitmap indicate blocks to be discarded */ struct discard_entry { struct list_head list; /* list head */ |