From 24aa6b41d4611b14ad0fb89fa0b899ae9ab7005c Mon Sep 17 00:00:00 2001 From: David Sterba Date: Thu, 8 Oct 2015 10:27:02 +0200 Subject: [PATCH] btrfs: introduce ratelimited _in_rcu variants of message printing functions Signed-off-by: David Sterba --- fs/btrfs/ctree.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 88acdff..9c0fd90 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -4057,16 +4057,38 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) #define btrfs_info_in_rcu(fs_info, fmt, args...) \ btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) +/* + * Wrappers that use a ratelimited printk_in_rcu + */ +#define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ + btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) +#define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ + btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) +#define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ + btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) +#define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ + btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) +#define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ + btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) +#define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ + btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) +#define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ + btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) + #ifdef DEBUG #define btrfs_debug(fs_info, fmt, args...) \ btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) +#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ + btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) #else #define btrfs_debug(fs_info, fmt, args...) \ no_printk(KERN_DEBUG fmt, ##args) #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ no_printk(KERN_DEBUG fmt, ##args) +#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ + no_printk(KERN_DEBUG fmt, ##args) #endif #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ @@ -4076,6 +4098,22 @@ do { \ rcu_read_unlock(); \ } while (0) +#define btrfs_printk_ratelimited(fs_info, fmt, args...) \ +do { \ + static DEFINE_RATELIMIT_STATE(_rs, \ + DEFAULT_RATELIMIT_INTERVAL, \ + DEFAULT_RATELIMIT_BURST); \ + if (__ratelimit(&_rs)) \ + btrfs_printk(fs_info, fmt, ##args); \ +} while (0) + +#define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ +do { \ + rcu_read_lock(); \ + btrfs_printk_ratelimited(fs_info, fmt, ##args); \ + rcu_read_unlock(); \ +} while (0) + #ifdef CONFIG_BTRFS_ASSERT __cold -- 2.7.4