diff options
Diffstat (limited to 'fs/bio.c')
| -rw-r--r-- | fs/bio.c | 12 |
1 files changed, 8 insertions, 4 deletions
@@ -25,6 +25,7 @@ #include <linux/module.h> #include <linux/mempool.h> #include <linux/workqueue.h> +#include <linux/blktrace_api.h> #include <scsi/sg.h> /* for struct sg_iovec */ #define BIO_POOL_SIZE 256 @@ -1095,6 +1096,9 @@ struct bio_pair *bio_split(struct bio *bi, mempool_t *pool, int first_sectors) if (!bp) return bp; + blk_add_trace_pdu_int(bdev_get_queue(bi->bi_bdev), BLK_TA_SPLIT, bi, + bi->bi_sector + first_sectors); + BUG_ON(bi->bi_vcnt != 1); BUG_ON(bi->bi_idx != 0); atomic_set(&bp->cnt, 3); @@ -1243,11 +1247,11 @@ static int __init init_bio(void) scale = 4; /* - * scale number of entries + * Limit number of entries reserved -- mempools are only used when + * the system is completely unable to allocate memory, so we only + * need enough to make progress. */ - bvec_pool_entries = megabytes * 2; - if (bvec_pool_entries > 256) - bvec_pool_entries = 256; + bvec_pool_entries = 1 + scale; fs_bio_set = bioset_create(BIO_POOL_SIZE, bvec_pool_entries, scale); if (!fs_bio_set) |
