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bio: pimp nr_requests

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This commit is contained in:
Thomas Schoebel-Theuer 2017-04-07 08:18:29 +02:00
parent 010ec65c33
commit 27be605623
3 changed files with 6 additions and 0 deletions
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4
kernel/mars_bio.c
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@ -51,6 +51,8 @@
#endif
// end_remove_this
int bio_nr_requests = 1024;
static struct timing_stats timings[2] = {};
struct threshold bio_submit_threshold = {
@ -801,6 +803,8 @@ static int bio_switch(struct bio_brick *brick)
MARS_INF("'%s' ra_pages OLD=%lu NEW=%d\n", path, q->backing_dev_info.ra_pages, brick->ra_pages);
q->backing_dev_info.ra_pages = brick->ra_pages;
q->nr_requests = bio_nr_requests;
brick->bvec_max = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
if (brick->bvec_max > BIO_MAX_PAGES)
brick->bvec_max = BIO_MAX_PAGES;

1
kernel/mars_bio.h
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@ -28,6 +28,7 @@
#define BIO_IO_R_MAX_LATENCY 40000 // 40 ms
#define BIO_IO_W_MAX_LATENCY 100000 // 100 ms
extern int bio_nr_requests;
extern struct threshold bio_submit_threshold;
extern struct threshold bio_io_threshold[2];

1
kernel/sy_old/mars_proc.c
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@ -236,6 +236,7 @@ struct ctl_table io_tuning_table[] = {
LIMITER_ENTRIES(&global_writeback.limiter, "writeback", "kb"),
INT_ENTRY("writeback_until_percent", global_writeback.until_percent, 0600),
THRESHOLD_ENTRIES(&global_io_threshold, "global_io"),
INT_ENTRY("bio_nr_requests", bio_nr_requests, 0600),
THRESHOLD_ENTRIES(&bio_submit_threshold, "bio_submit"),
THRESHOLD_ENTRIES(&bio_io_threshold[0], "bio_io_r"),
THRESHOLD_ENTRIES(&bio_io_threshold[1], "bio_io_w"),