* [PATCH v1 1/1] iopoll: Use fsleep() instead of usleep_range()
@ 2025-05-02 13:43 Andy Shevchenko
2025-06-13 8:48 ` Andy Shevchenko
0 siblings, 1 reply; 2+ messages in thread
From: Andy Shevchenko @ 2025-05-02 13:43 UTC (permalink / raw)
To: Anna-Maria Behnsen, linux-kernel; +Cc: Andrew Morton, Andy Shevchenko
Use fsleep() instead of usleep_range() to improve small time delays
by avoiding the timer use. With this, use slightly bigger initial
delays then was passed to usleep_range().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
include/linux/iopoll.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/iopoll.h b/include/linux/iopoll.h
index 91324c331a4b..fca50f117fae 100644
--- a/include/linux/iopoll.h
+++ b/include/linux/iopoll.h
@@ -41,7 +41,7 @@
ktime_t __timeout = ktime_add_us(ktime_get(), __timeout_us); \
might_sleep_if((__sleep_us) != 0); \
if (sleep_before_read && __sleep_us) \
- usleep_range((__sleep_us >> 2) + 1, __sleep_us); \
+ fsleep((__sleep_us >> 1) + 1); \
for (;;) { \
(val) = op(args); \
if (cond) \
@@ -52,7 +52,7 @@
break; \
} \
if (__sleep_us) \
- usleep_range((__sleep_us >> 2) + 1, __sleep_us); \
+ fsleep((__sleep_us >> 1) + 1); \
cpu_relax(); \
} \
(cond) ? 0 : -ETIMEDOUT; \
--
2.47.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v1 1/1] iopoll: Use fsleep() instead of usleep_range()
2025-05-02 13:43 [PATCH v1 1/1] iopoll: Use fsleep() instead of usleep_range() Andy Shevchenko
@ 2025-06-13 8:48 ` Andy Shevchenko
0 siblings, 0 replies; 2+ messages in thread
From: Andy Shevchenko @ 2025-06-13 8:48 UTC (permalink / raw)
To: Anna-Maria Behnsen, linux-kernel; +Cc: Andrew Morton
On Fri, May 02, 2025 at 04:43:45PM +0300, Andy Shevchenko wrote:
> Use fsleep() instead of usleep_range() to improve small time delays
> by avoiding the timer use. With this, use slightly bigger initial
> delays then was passed to usleep_range().
Any comments anybody?
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 2+ messages in thread
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