diff options
| -rw-r--r-- | include/linux/vmpressure.h | 2 | ||||
| -rw-r--r-- | mm/memcontrol.c | 65 | ||||
| -rw-r--r-- | mm/vmpressure.c | 14 |
3 files changed, 38 insertions, 43 deletions
diff --git a/include/linux/vmpressure.h b/include/linux/vmpressure.h index 9dd1914f1a6c..b048365a7ed9 100644 --- a/include/linux/vmpressure.h +++ b/include/linux/vmpressure.h @@ -36,11 +36,9 @@ extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg); extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr); extern struct vmpressure *css_to_vmpressure(struct cgroup_subsys_state *css); extern int vmpressure_register_event(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd, const char *args); extern void vmpressure_unregister_event(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd); #else static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 2fcacb18404b..3c93dcfd26da 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -237,10 +237,6 @@ struct cgroup_event { */ struct cgroup_subsys_state *css; /* - * Control file which the event associated. - */ - struct cftype *cft; - /* * eventfd to signal userspace about the event. */ struct eventfd_ctx *eventfd; @@ -254,15 +250,13 @@ struct cgroup_event { * on eventfd to send notification to userspace. */ int (*register_event)(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd, - const char *args); + struct eventfd_ctx *eventfd, const char *args); /* * unregister_event() callback will be called when userspace closes * the eventfd or on cgroup removing. This callback must be set, * if you want provide notification functionality. */ void (*unregister_event)(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd); /* * All fields below needed to unregister event when @@ -5688,13 +5682,12 @@ static void mem_cgroup_oom_notify(struct mem_cgroup *memcg) mem_cgroup_oom_notify_cb(iter); } -static int mem_cgroup_usage_register_event(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd, const char *args) +static int __mem_cgroup_usage_register_event(struct cgroup_subsys_state *css, + struct eventfd_ctx *eventfd, const char *args, enum res_type type) { struct mem_cgroup *memcg = mem_cgroup_from_css(css); struct mem_cgroup_thresholds *thresholds; struct mem_cgroup_threshold_ary *new; - enum res_type type = MEMFILE_TYPE(cft->private); u64 threshold, usage; int i, size, ret; @@ -5771,13 +5764,24 @@ unlock: return ret; } -static void mem_cgroup_usage_unregister_event(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd) +static int mem_cgroup_usage_register_event(struct cgroup_subsys_state *css, + struct eventfd_ctx *eventfd, const char *args) +{ + return __mem_cgroup_usage_register_event(css, eventfd, args, _MEM); +} + +static int memsw_cgroup_usage_register_event(struct cgroup_subsys_state *css, + struct eventfd_ctx *eventfd, const char *args) +{ + return __mem_cgroup_usage_register_event(css, eventfd, args, _MEMSWAP); +} + +static void __mem_cgroup_usage_unregister_event(struct cgroup_subsys_state *css, + struct eventfd_ctx *eventfd, enum res_type type) { struct mem_cgroup *memcg = mem_cgroup_from_css(css); struct mem_cgroup_thresholds *thresholds; struct mem_cgroup_threshold_ary *new; - enum res_type type = MEMFILE_TYPE(cft->private); u64 usage; int i, j, size; @@ -5850,14 +5854,24 @@ unlock: mutex_unlock(&memcg->thresholds_lock); } +static void mem_cgroup_usage_unregister_event(struct cgroup_subsys_state *css, + struct eventfd_ctx *eventfd) +{ + return __mem_cgroup_usage_unregister_event(css, eventfd, _MEM); +} + +static void memsw_cgroup_usage_unregister_event(struct cgroup_subsys_state *css, + struct eventfd_ctx *eventfd) +{ + return __mem_cgroup_usage_unregister_event(css, eventfd, _MEMSWAP); +} + static int mem_cgroup_oom_register_event(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd, const char *args) + struct eventfd_ctx *eventfd, const char *args) { struct mem_cgroup *memcg = mem_cgroup_from_css(css); struct mem_cgroup_eventfd_list *event; - enum res_type type = MEMFILE_TYPE(cft->private); - BUG_ON(type != _OOM_TYPE); event = kmalloc(sizeof(*event), GFP_KERNEL); if (!event) return -ENOMEM; @@ -5876,13 +5890,10 @@ static int mem_cgroup_oom_register_event(struct cgroup_subsys_state *css, } static void mem_cgroup_oom_unregister_event(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd) + struct eventfd_ctx *eventfd) { struct mem_cgroup *memcg = mem_cgroup_from_css(css); struct mem_cgroup_eventfd_list *ev, *tmp; - enum res_type type = MEMFILE_TYPE(cft->private); - - BUG_ON(type != _OOM_TYPE); spin_lock(&memcg_oom_lock); @@ -6012,7 +6023,7 @@ static void cgroup_event_remove(struct work_struct *work) remove_wait_queue(event->wqh, &event->wait); - event->unregister_event(css, event->cft, event->eventfd); + event->unregister_event(css, event->eventfd); /* Notify userspace the event is going away. */ eventfd_signal(event->eventfd, 1); @@ -6133,12 +6144,6 @@ static int cgroup_write_event_control(struct cgroup_subsys_state *css, if (ret < 0) goto out_put_cfile; - event->cft = __file_cft(cfile.file); - if (IS_ERR(event->cft)) { - ret = PTR_ERR(event->cft); - goto out_put_cfile; - } - /* * Determine the event callbacks and set them in @event. This used * to be done via struct cftype but cgroup core no longer knows @@ -6157,8 +6162,8 @@ static int cgroup_write_event_control(struct cgroup_subsys_state *css, event->register_event = vmpressure_register_event; event->unregister_event = vmpressure_unregister_event; } else if (!strcmp(name, "memory.memsw.usage_in_bytes")) { - event->register_event = mem_cgroup_usage_register_event; - event->unregister_event = mem_cgroup_usage_unregister_event; + event->register_event = memsw_cgroup_usage_register_event; + event->unregister_event = memsw_cgroup_usage_unregister_event; } else { ret = -EINVAL; goto out_put_cfile; @@ -6181,7 +6186,7 @@ static int cgroup_write_event_control(struct cgroup_subsys_state *css, if (ret) goto out_put_cfile; - ret = event->register_event(css, event->cft, event->eventfd, buffer); + ret = event->register_event(css, event->eventfd, buffer); if (ret) goto out_put_css; diff --git a/mm/vmpressure.c b/mm/vmpressure.c index e0f62837c3f4..0f25a996d150 100644 --- a/mm/vmpressure.c +++ b/mm/vmpressure.c @@ -279,7 +279,6 @@ void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio) /** * vmpressure_register_event() - Bind vmpressure notifications to an eventfd * @css: css that is interested in vmpressure notifications - * @cft: cgroup control files handle * @eventfd: eventfd context to link notifications with * @args: event arguments (used to set up a pressure level threshold) * @@ -289,13 +288,10 @@ void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio) * threshold (one of vmpressure_str_levels, i.e. "low", "medium", or * "critical"). * - * This function should not be used directly, just pass it to (struct - * cftype).register_event, and then cgroup core will handle everything by - * itself. + * To be used as memcg event method. */ int vmpressure_register_event(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd, - const char *args) + struct eventfd_ctx *eventfd, const char *args) { struct vmpressure *vmpr = css_to_vmpressure(css); struct vmpressure_event *ev; @@ -326,19 +322,15 @@ int vmpressure_register_event(struct cgroup_subsys_state *css, /** * vmpressure_unregister_event() - Unbind eventfd from vmpressure * @css: css handle - * @cft: cgroup control files handle * @eventfd: eventfd context that was used to link vmpressure with the @cg * * This function does internal manipulations to detach the @eventfd from * the vmpressure notifications, and then frees internal resources * associated with the @eventfd (but the @eventfd itself is not freed). * - * This function should not be used directly, just pass it to (struct - * cftype).unregister_event, and then cgroup core will handle everything - * by itself. + * To be used as memcg event method. */ void vmpressure_unregister_event(struct cgroup_subsys_state *css, - struct cftype *cft, struct eventfd_ctx *eventfd) { struct vmpressure *vmpr = css_to_vmpressure(css); |