hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAJUN4 -------------------------------- When MBM is implemented according to the *DDI0598* protocol, that is, mbm_total_bytes interface returns the statistical results of instantaneous bandwidth traffic, there is no need to create a delay_work to handle MBM statistical overflow. No matter it is MBWU or CSU monitors, using per-CLOSID monitoring instances avoids inaccurate statistical results caused by monitor multiplexing, which can occur when multiple control groups are monitored simultaneously. Fixes: 9119da143939 ("arm_mpam: resctrl: Allow resctrl to allocate monitors") Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/platform/mpam/mpam_resctrl.c | 33 +++++++--------------------- 1 file changed, 8 insertions(+), 25 deletions(-) diff --git a/drivers/platform/mpam/mpam_resctrl.c b/drivers/platform/mpam/mpam_resctrl.c index 9aadf009b6a8..728f03a2a3f6 100644 --- a/drivers/platform/mpam/mpam_resctrl.c +++ b/drivers/platform/mpam/mpam_resctrl.c @@ -254,7 +254,6 @@ struct rdt_resource *resctrl_arch_get_resource(enum resctrl_res_level l) static void *resctrl_arch_mon_ctx_alloc_no_wait(struct rdt_resource *r, int evtid) { - struct mpam_resctrl_res *res; u32 *ret = kmalloc(sizeof(*ret), GFP_KERNEL); if (!ret) @@ -262,11 +261,6 @@ static void *resctrl_arch_mon_ctx_alloc_no_wait(struct rdt_resource *r, switch (evtid) { case QOS_L3_OCCUP_EVENT_ID: - res = container_of(r, struct mpam_resctrl_res, resctrl_res); - - *ret = mpam_alloc_csu_mon(res->class); - return ret; - case QOS_L3_MBM_LOCAL_EVENT_ID: case QOS_L3_MBM_TOTAL_EVENT_ID: *ret = __mon_is_rmid_idx; @@ -300,21 +294,7 @@ void *resctrl_arch_mon_ctx_alloc(struct rdt_resource *r, int evtid) void resctrl_arch_mon_ctx_free(struct rdt_resource *r, int evtid, void *arch_mon_ctx) { - struct mpam_resctrl_res *res; - u32 mon = *(u32 *)arch_mon_ctx; - kfree(arch_mon_ctx); - - switch (evtid) { - case QOS_L3_OCCUP_EVENT_ID: - res = container_of(r, struct mpam_resctrl_res, resctrl_res); - mpam_free_csu_mon(res->class, mon); - wake_up(&resctrl_mon_ctx_waiters); - return; - case QOS_L3_MBM_TOTAL_EVENT_ID: - case QOS_L3_MBM_LOCAL_EVENT_ID: - return; - } } static enum mon_filter_options resctrl_evt_config_to_mpam(u32 local_evt_cfg) @@ -335,7 +315,7 @@ int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain *d, { int err; u64 cdp_val; - u16 num_mbwu_mon; + u16 num_mon; struct mon_cfg cfg; struct mpam_resctrl_dom *dom; struct mpam_resctrl_res *res; @@ -362,12 +342,15 @@ int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain *d, if (cfg.mon == USE_RMID_IDX) { /* * The number of mbwu monitors can't support free run mode, - * adapt the remainder of rmid to the num_mbwu_mon as a - * compromise. + * adapt the remainder of rmid to the num_mon as compromise. */ res = container_of(r, struct mpam_resctrl_res, resctrl_res); - num_mbwu_mon = res->class->props.num_mbwu_mon; - cfg.mon = resctrl_arch_rmid_idx_encode(closid, rmid) % num_mbwu_mon; + if (type == mpam_feat_msmon_mbwu) + num_mon = res->class->props.num_mbwu_mon; + else + num_mon = res->class->props.num_csu_mon; + + cfg.mon = closid % num_mon; } cfg.match_pmg = true; -- 2.25.1