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copy: speed up by hinting

This commit is contained in:
Thomas Schoebel-Theuer 2017-02-25 17:42:37 +01:00 committed by Thomas Schoebel-Theuer
parent fa91db51ef
commit 7e2de9c4ac
2 changed files with 15 additions and 0 deletions
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14
kernel/mars_copy.c
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@ -223,6 +223,8 @@ void copy_endio(struct generic_callback *cb)
brick = mref_a->brick;
CHECK_PTR(brick, err);
brick->check_hint = mref->ref_pos;
queue = mref_a->queue;
index = GET_INDEX(mref->ref_pos);
st = &GET_STATE(brick, index);
@ -775,6 +777,7 @@ static int _copy_thread(void *data)
brick->copy_error_count = 0;
brick->verify_ok_count = 0;
brick->verify_error_count = 0;
brick->check_hint = 0;
_update_percent(brick, true);
@ -784,9 +787,18 @@ static int _copy_thread(void *data)
loff_t old_start = brick->copy_start;
loff_t old_end = brick->copy_end;
int progress = 0;
loff_t check_hint;
if (old_end > 0) {
progress = _run_copy(brick, -1);
/* This is racy, deliberately.
* Missing some events does no harm.
*/
check_hint = brick->check_hint;
if (check_hint > 0) {
brick->check_hint = 0;
progress += _run_copy(brick, check_hint);
}
/* abort when no progress is made for a longer time */
if (progress > 0) {
last_progress = CURRENT_TIME;
@ -928,6 +940,7 @@ char *copy_statistics(struct copy_brick *brick, int verbose)
"copy_last = %lld "
"copy_dirty = %lld "
"copy_end = %lld "
"check_hint = %lld "
"copy_error = %d "
"copy_error_count = %d "
"verify_ok_count = %d "
@ -943,6 +956,7 @@ char *copy_statistics(struct copy_brick *brick, int verbose)
brick->copy_last,
brick->copy_dirty,
brick->copy_end,
brick->check_hint,
brick->copy_error,
brick->copy_error_count,
brick->verify_ok_count,

1
kernel/mars_copy.h
View File

@ -101,6 +101,7 @@ struct copy_brick {
atomic_t copy_read_flight;
atomic_t copy_write_flight;
long long last_jiffies;
loff_t check_hint;
wait_queue_head_t event;
struct task_struct *thread;
struct copy_state **st;