From 7702e8f45b0a3bb262b9366c60beb5445758d94c Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Wed, 15 Sep 2010 17:06:36 -0400 Subject: blk-cgroup: cgroup changes for IOPS limit support o cgroup changes for IOPS throttling rules. Signed-off-by: Vivek Goyal Signed-off-by: Jens Axboe --- block/blk-cgroup.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++------- block/blk-cgroup.h | 13 +++++ 2 files changed, 135 insertions(+), 17 deletions(-) (limited to 'block') diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index aae8c93..20ce6f5 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -149,6 +149,27 @@ static inline void blkio_update_group_bps(struct blkio_group *blkg, u64 bps, } } +static inline void blkio_update_group_iops(struct blkio_group *blkg, + unsigned int iops, int fileid) +{ + struct blkio_policy_type *blkiop; + + list_for_each_entry(blkiop, &blkio_list, list) { + + /* If this policy does not own the blkg, do not send updates */ + if (blkiop->plid != blkg->plid) + continue; + + if (fileid == BLKIO_THROTL_read_iops_device + && blkiop->ops.blkio_update_group_read_iops_fn) + blkiop->ops.blkio_update_group_read_iops_fn(blkg, iops); + + if (fileid == BLKIO_THROTL_write_iops_device + && blkiop->ops.blkio_update_group_write_iops_fn) + blkiop->ops.blkio_update_group_write_iops_fn(blkg,iops); + } +} + /* * Add to the appropriate stat variable depending on the request type. * This should be called with the blkg->stats_lock held. @@ -630,7 +651,7 @@ static int blkio_policy_parse_and_set(char *buf, { char *s[4], *p, *major_s = NULL, *minor_s = NULL; int ret; - unsigned long major, minor, temp; + unsigned long major, minor, temp, iops; int i = 0; dev_t dev; u64 bps; @@ -692,13 +713,28 @@ static int blkio_policy_parse_and_set(char *buf, newpn->val.weight = temp; break; case BLKIO_POLICY_THROTL: - ret = strict_strtoull(s[1], 10, &bps); - if (ret) - return -EINVAL; + switch(fileid) { + case BLKIO_THROTL_read_bps_device: + case BLKIO_THROTL_write_bps_device: + ret = strict_strtoull(s[1], 10, &bps); + if (ret) + return -EINVAL; - newpn->plid = plid; - newpn->fileid = fileid; - newpn->val.bps = bps; + newpn->plid = plid; + newpn->fileid = fileid; + newpn->val.bps = bps; + break; + case BLKIO_THROTL_read_iops_device: + case BLKIO_THROTL_write_iops_device: + ret = strict_strtoul(s[1], 10, &iops); + if (ret) + return -EINVAL; + + newpn->plid = plid; + newpn->fileid = fileid; + newpn->val.iops = iops; + break; + } break; default: BUG(); @@ -744,6 +780,29 @@ uint64_t blkcg_get_write_bps(struct blkio_cgroup *blkcg, dev_t dev) return -1; } +unsigned int blkcg_get_read_iops(struct blkio_cgroup *blkcg, dev_t dev) +{ + struct blkio_policy_node *pn; + + pn = blkio_policy_search_node(blkcg, dev, BLKIO_POLICY_THROTL, + BLKIO_THROTL_read_iops_device); + if (pn) + return pn->val.iops; + else + return -1; +} + +unsigned int blkcg_get_write_iops(struct blkio_cgroup *blkcg, dev_t dev) +{ + struct blkio_policy_node *pn; + pn = blkio_policy_search_node(blkcg, dev, BLKIO_POLICY_THROTL, + BLKIO_THROTL_write_iops_device); + if (pn) + return pn->val.iops; + else + return -1; +} + /* Checks whether user asked for deleting a policy rule */ static bool blkio_delete_rule_command(struct blkio_policy_node *pn) { @@ -753,8 +812,17 @@ static bool blkio_delete_rule_command(struct blkio_policy_node *pn) return 1; break; case BLKIO_POLICY_THROTL: - if (pn->val.bps == 0) - return 1; + switch(pn->fileid) { + case BLKIO_THROTL_read_bps_device: + case BLKIO_THROTL_write_bps_device: + if (pn->val.bps == 0) + return 1; + break; + case BLKIO_THROTL_read_iops_device: + case BLKIO_THROTL_write_iops_device: + if (pn->val.iops == 0) + return 1; + } break; default: BUG(); @@ -771,7 +839,15 @@ static void blkio_update_policy_rule(struct blkio_policy_node *oldpn, oldpn->val.weight = newpn->val.weight; break; case BLKIO_POLICY_THROTL: - oldpn->val.bps = newpn->val.bps; + switch(newpn->fileid) { + case BLKIO_THROTL_read_bps_device: + case BLKIO_THROTL_write_bps_device: + oldpn->val.bps = newpn->val.bps; + break; + case BLKIO_THROTL_read_iops_device: + case BLKIO_THROTL_write_iops_device: + oldpn->val.iops = newpn->val.iops; + } break; default: BUG(); @@ -785,7 +861,7 @@ static void blkio_update_policy_rule(struct blkio_policy_node *oldpn, static void blkio_update_blkg_policy(struct blkio_cgroup *blkcg, struct blkio_group *blkg, struct blkio_policy_node *pn) { - unsigned int weight; + unsigned int weight, iops; u64 bps; switch(pn->plid) { @@ -801,6 +877,11 @@ static void blkio_update_blkg_policy(struct blkio_cgroup *blkcg, bps = pn->val.bps ? pn->val.bps : (-1); blkio_update_group_bps(blkg, bps, pn->fileid); break; + case BLKIO_THROTL_read_iops_device: + case BLKIO_THROTL_write_iops_device: + iops = pn->val.iops ? pn->val.iops : (-1); + blkio_update_group_iops(blkg, iops, pn->fileid); + break; } break; default: @@ -900,14 +981,18 @@ blkio_print_policy_node(struct seq_file *m, struct blkio_policy_node *pn) MINOR(pn->dev), pn->val.weight); break; case BLKIO_POLICY_THROTL: - if (pn->fileid == BLKIO_THROTL_read_bps_device) + switch(pn->fileid) { + case BLKIO_THROTL_read_bps_device: + case BLKIO_THROTL_write_bps_device: seq_printf(m, "%u:%u\t%llu\n", MAJOR(pn->dev), MINOR(pn->dev), pn->val.bps); - else if (pn->fileid == BLKIO_THROTL_write_bps_device) - seq_printf(m, "%u:%u\t%llu\n", MAJOR(pn->dev), - MINOR(pn->dev), pn->val.bps); - else - BUG(); + break; + case BLKIO_THROTL_read_iops_device: + case BLKIO_THROTL_write_iops_device: + seq_printf(m, "%u:%u\t%u\n", MAJOR(pn->dev), + MINOR(pn->dev), pn->val.iops); + break; + } break; default: BUG(); @@ -954,6 +1039,8 @@ static int blkiocg_file_read(struct cgroup *cgrp, struct cftype *cft, switch(name){ case BLKIO_THROTL_read_bps_device: case BLKIO_THROTL_write_bps_device: + case BLKIO_THROTL_read_iops_device: + case BLKIO_THROTL_write_iops_device: blkio_read_policy_node_files(cft, blkcg, m); return 0; default: @@ -1171,6 +1258,24 @@ struct cftype blkio_files[] = { .write_string = blkiocg_file_write, .max_write_len = 256, }, + + { + .name = "throttle.read_iops_device", + .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL, + BLKIO_THROTL_read_iops_device), + .read_seq_string = blkiocg_file_read, + .write_string = blkiocg_file_write, + .max_write_len = 256, + }, + + { + .name = "throttle.write_iops_device", + .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL, + BLKIO_THROTL_write_iops_device), + .read_seq_string = blkiocg_file_read, + .write_string = blkiocg_file_write, + .max_write_len = 256, + }, { .name = "time", .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP, diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h index 1b73882..2070053 100644 --- a/block/blk-cgroup.h +++ b/block/blk-cgroup.h @@ -93,6 +93,8 @@ enum blkcg_file_name_prop { enum blkcg_file_name_throtl { BLKIO_THROTL_read_bps_device, BLKIO_THROTL_write_bps_device, + BLKIO_THROTL_read_iops_device, + BLKIO_THROTL_write_iops_device, BLKIO_THROTL_io_service_bytes, BLKIO_THROTL_io_serviced, }; @@ -168,6 +170,7 @@ struct blkio_policy_node { * by file type "fileid". */ u64 bps; + unsigned int iops; } val; }; @@ -177,6 +180,10 @@ extern uint64_t blkcg_get_read_bps(struct blkio_cgroup *blkcg, dev_t dev); extern uint64_t blkcg_get_write_bps(struct blkio_cgroup *blkcg, dev_t dev); +extern unsigned int blkcg_get_read_iops(struct blkio_cgroup *blkcg, + dev_t dev); +extern unsigned int blkcg_get_write_iops(struct blkio_cgroup *blkcg, + dev_t dev); typedef void (blkio_unlink_group_fn) (void *key, struct blkio_group *blkg); typedef void (blkio_update_group_weight_fn) (struct blkio_group *blkg, @@ -185,12 +192,18 @@ typedef void (blkio_update_group_read_bps_fn) (struct blkio_group *blkg, u64 read_bps); typedef void (blkio_update_group_write_bps_fn) (struct blkio_group *blkg, u64 write_bps); +typedef void (blkio_update_group_read_iops_fn) (struct blkio_group *blkg, + unsigned int read_iops); +typedef void (blkio_update_group_write_iops_fn) (struct blkio_group *blkg, + unsigned int write_iops); struct blkio_policy_ops { blkio_unlink_group_fn *blkio_unlink_group_fn; blkio_update_group_weight_fn *blkio_update_group_weight_fn; blkio_update_group_read_bps_fn *blkio_update_group_read_bps_fn; blkio_update_group_write_bps_fn *blkio_update_group_write_bps_fn; + blkio_update_group_read_iops_fn *blkio_update_group_read_iops_fn; + blkio_update_group_write_iops_fn *blkio_update_group_write_iops_fn; }; struct blkio_policy_type { -- cgit v1.1