From e98ef89b30b8a2e882b11d4965347015770f3627 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Fri, 18 Jun 2010 10:39:47 -0400 Subject: cfq-iosched: Fixed boot warning with BLK_CGROUP=y and CFQ_GROUP_IOSCHED=n Hi Jens, Few days back Ingo noticed a CFQ boot time warning. This patch fixes it. The issue here is that with CFQ_GROUP_IOSCHED=n, CFQ should not really be making blkio stat related calls. > Hm, it's still not entirely fixed, as of 2.6.35-rc2-00131-g7908a9e. With > some > configs i get bad spinlock warnings during bootup: > > [ 28.968013] initcall net_olddevs_init+0x0/0x82 returned 0 after 93750 > usecs > [ 28.972003] calling b44_init+0x0/0x55 @ 1 > [ 28.976009] bus: 'pci': add driver b44 > [ 28.976374] sda: > [ 28.978157] BUG: spinlock bad magic on CPU#1, async/0/117 > [ 28.980000] lock: 7e1c5bbc, .magic: 00000000, .owner: /-1, +.owner_cpu: 0 > [ 28.980000] Pid: 117, comm: async/0 Not tainted +2.6.35-rc2-tip-01092-g010e7ef-dirty #8183 > [ 28.980000] Call Trace: > [ 28.980000] [<41ba6d55>] ? printk+0x20/0x24 > [ 28.980000] [<4134b7b7>] spin_bug+0x7c/0x87 > [ 28.980000] [<4134b853>] do_raw_spin_lock+0x1e/0x123 > [ 28.980000] [<41ba92ca>] ? _raw_spin_lock_irqsave+0x12/0x20 > [ 28.980000] [<41ba92d2>] _raw_spin_lock_irqsave+0x1a/0x20 > [ 28.980000] [<4133476f>] blkiocg_update_io_add_stats+0x25/0xfb > [ 28.980000] [<41335dae>] ? cfq_prio_tree_add+0xb1/0xc1 > [ 28.980000] [<41337bc7>] cfq_insert_request+0x8c/0x425 Signed-off-by: Vivek Goyal Signed-off-by: Jens Axboe --- block/cfq.h | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 block/cfq.h (limited to 'block/cfq.h') diff --git a/block/cfq.h b/block/cfq.h new file mode 100644 index 000000000000..8783318dc5be --- /dev/null +++ b/block/cfq.h @@ -0,0 +1,115 @@ +#ifndef _CFQ_H +#define _CFQ_H +#include "blk-cgroup.h" + +#ifdef CONFIG_CFQ_GROUP_IOSCHED +static inline void cfq_blkiocg_update_io_add_stats(struct blkio_group *blkg, + struct blkio_group *curr_blkg, bool direction, bool sync) +{ + blkiocg_update_io_add_stats(blkg, curr_blkg, direction, sync); +} + +static inline void cfq_blkiocg_update_dequeue_stats(struct blkio_group *blkg, + unsigned long dequeue) +{ + blkiocg_update_dequeue_stats(blkg, dequeue); +} + +static inline void cfq_blkiocg_update_timeslice_used(struct blkio_group *blkg, + unsigned long time) +{ + blkiocg_update_timeslice_used(blkg, time); +} + +static inline void cfq_blkiocg_set_start_empty_time(struct blkio_group *blkg) +{ + blkiocg_set_start_empty_time(blkg); +} + +static inline void cfq_blkiocg_update_io_remove_stats(struct blkio_group *blkg, + bool direction, bool sync) +{ + blkiocg_update_io_remove_stats(blkg, direction, sync); +} + +static inline void cfq_blkiocg_update_io_merged_stats(struct blkio_group *blkg, + bool direction, bool sync) +{ + blkiocg_update_io_merged_stats(blkg, direction, sync); +} + +static inline void cfq_blkiocg_update_idle_time_stats(struct blkio_group *blkg) +{ + blkiocg_update_idle_time_stats(blkg); +} + +static inline void +cfq_blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg) +{ + blkiocg_update_avg_queue_size_stats(blkg); +} + +static inline void +cfq_blkiocg_update_set_idle_time_stats(struct blkio_group *blkg) +{ + blkiocg_update_set_idle_time_stats(blkg); +} + +static inline void cfq_blkiocg_update_dispatch_stats(struct blkio_group *blkg, + uint64_t bytes, bool direction, bool sync) +{ + blkiocg_update_dispatch_stats(blkg, bytes, direction, sync); +} + +static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg, uint64_t start_time, uint64_t io_start_time, bool direction, bool sync) +{ + cfq_blkiocg_update_completion_stats(blkg, start_time, io_start_time, + direction, sync); +} + +static inline void cfq_blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, + struct blkio_group *blkg, void *key, dev_t dev) { + blkiocg_add_blkio_group(blkcg, blkg, key, dev); +} + +static inline int cfq_blkiocg_del_blkio_group(struct blkio_group *blkg) +{ + return blkiocg_del_blkio_group(blkg); +} + +#else /* CFQ_GROUP_IOSCHED */ +static inline void cfq_blkiocg_update_io_add_stats(struct blkio_group *blkg, + struct blkio_group *curr_blkg, bool direction, bool sync) {} + +static inline void cfq_blkiocg_update_dequeue_stats(struct blkio_group *blkg, + unsigned long dequeue) {} + +static inline void cfq_blkiocg_update_timeslice_used(struct blkio_group *blkg, + unsigned long time) {} +static inline void cfq_blkiocg_set_start_empty_time(struct blkio_group *blkg) {} +static inline void cfq_blkiocg_update_io_remove_stats(struct blkio_group *blkg, + bool direction, bool sync) {} +static inline void cfq_blkiocg_update_io_merged_stats(struct blkio_group *blkg, + bool direction, bool sync) {} +static inline void cfq_blkiocg_update_idle_time_stats(struct blkio_group *blkg) +{ +} +static inline void +cfq_blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg) {} + +static inline void +cfq_blkiocg_update_set_idle_time_stats(struct blkio_group *blkg) {} + +static inline void cfq_blkiocg_update_dispatch_stats(struct blkio_group *blkg, + uint64_t bytes, bool direction, bool sync) {} +static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg, uint64_t start_time, uint64_t io_start_time, bool direction, bool sync) {} + +static inline void cfq_blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, + struct blkio_group *blkg, void *key, dev_t dev) {} +static inline int cfq_blkiocg_del_blkio_group(struct blkio_group *blkg) +{ + return 0; +} + +#endif /* CFQ_GROUP_IOSCHED */ +#endif -- cgit v1.2.3