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[PATCH v3 4/4] xen/console: reduce number of printouts in __printk_ratelimit()
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: dmukhin@xxxxxxxx
- Date: Wed, 15 Jul 2026 13:19:02 -0700
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- Delivery-date: Wed, 15 Jul 2026 20:19:45 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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From: Denis Mukhin <dmukhin@xxxxxxxx>
Fold several __putstr() calls into one around notification of how many
messages have been rate-limited.
Not a functional change.
Signed-off-by: Denis Mukhin <dmukhin@xxxxxxxx>
---
Changes since v2:
- corrected the commit message
---
xen/drivers/char/console.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c
index a9520f5521e4..f9a565fc59bc 100644
--- a/xen/drivers/char/console.c
+++ b/xen/drivers/char/console.c
@@ -1303,15 +1303,15 @@ bool __printk_ratelimit(unsigned int ratelimit_ms,
spin_unlock(&ratelimit_lock);
if ( lost )
{
- char lost_str[10];
+ char msg[64];
+
+ snprintf(msg, sizeof(msg),
+ "printk: %u messages suppressed\n", lost);
- snprintf(lost_str, sizeof(lost_str), "%u", lost);
/* console_lock may already be acquired by printk(). */
rspin_lock(&console_lock);
printk_start_of_line(CONSOLE_PREFIX);
- __putstr("printk: ");
- __putstr(lost_str);
- __putstr(" messages suppressed.\n");
+ __putstr(msg);
rspin_unlock(&console_lock);
}
local_irq_restore(flags);
--
2.54.0
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