From: Tony Asleson <tasleson@redhat.com>
To: linux-scsi@vger.kernel.org, linux-block@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: [RFC 3/9] printk: Add printk_emit_ratelimited macro
Date: Mon, 23 Dec 2019 16:55:52 -0600 [thread overview]
Message-ID: <20191223225558.19242-4-tasleson@redhat.com> (raw)
In-Reply-To: <20191223225558.19242-1-tasleson@redhat.com>
Needed so we can add structured data to the block layer
logging.
Signed-off-by: Tony Asleson <tasleson@redhat.com>
---
include/linux/printk.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 06c3ba5b695e..dd41b79e6f06 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -172,6 +172,18 @@ int printk_emit(int facility, int level,
const char *dict, size_t dictlen,
const char *fmt, ...);
+#define printk_emit_ratelimited(facility, level, \
+ dict, dict_len, fmt, ...) \
+({ \
+ static DEFINE_RATELIMIT_STATE(_ers, \
+ DEFAULT_RATELIMIT_INTERVAL, \
+ DEFAULT_RATELIMIT_BURST); \
+ \
+ if (__ratelimit(&_ers)) \
+ printk_emit(facility, level, \
+ dict, dict_len, fmt, ##__VA_ARGS__); \
+})
+
asmlinkage __printf(1, 2) __cold
int printk(const char *fmt, ...);
--
2.21.0
next prev parent reply other threads:[~2019-12-23 22:56 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-23 22:55 [RFC 0/9] Add persistent durable identifier to storage log messages Tony Asleson
2019-12-23 22:55 ` [RFC 1/9] lib/string: Add function to trim duplicate WS Tony Asleson
2019-12-23 23:28 ` Matthew Wilcox
2020-01-02 22:52 ` Tony Asleson
2020-01-03 14:30 ` Tony Asleson
2019-12-23 22:55 ` [RFC 2/9] printk: Bring back printk_emit Tony Asleson
2019-12-23 22:55 ` Tony Asleson [this message]
2019-12-23 22:55 ` [RFC 4/9] struct device_type: Add function callback durable_name Tony Asleson
2019-12-23 22:55 ` [RFC 5/9] block: Add support functions for persistent durable name Tony Asleson
2019-12-23 22:55 ` [RFC 6/9] create_syslog_header: Add " Tony Asleson
2019-12-24 0:54 ` James Bottomley
2020-01-02 22:53 ` Tony Asleson
2019-12-23 22:55 ` [RFC 7/9] print_req_error: Add persistent " Tony Asleson
2019-12-23 22:55 ` [RFC 8/9] ata_dev_printk: Add durable name to output Tony Asleson
2019-12-24 0:56 ` James Bottomley
2019-12-23 22:55 ` [RFC 9/9] __xfs_printk: " Tony Asleson
2020-01-04 2:56 ` Dave Chinner
2020-01-06 2:45 ` Tony Asleson
2020-01-06 22:02 ` Dave Chinner
2020-01-07 0:19 ` Sweet Tea Dorminy
2020-01-07 1:23 ` Dave Chinner
2020-01-07 17:01 ` Tony Asleson
2020-01-08 2:10 ` Dave Chinner
2020-01-08 16:53 ` Tony Asleson
2020-01-09 1:41 ` Alasdair G Kergon
2020-01-09 23:22 ` Dave Chinner
2020-01-10 1:28 ` Alasdair G Kergon
2020-01-10 16:13 ` Tony Asleson
2019-12-24 0:50 ` [RFC 0/9] Add persistent durable identifier to storage log messages James Bottomley
2020-01-02 22:52 ` Tony Asleson
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