Messages in this thread Patch in this message | | | Date | Thu, 01 Aug 2019 13:13:53 +0200 | From | Peter Zijlstra <> | Subject | [PATCH 5/5] spi: Reduce kthread priority |
| |
The SPI thingies request FIFO-99 by default, reduce this to FIFO-50.
FIFO-99 is the very highest priority available to SCHED_FIFO and it not a suitable default; it would indicate the SPI work is the most important work on the machine.
Cc: Benson Leung <bleung@chromium.org> Cc: Enric Balletbo i Serra <enric.balletbo@collabora.com> Cc: Guenter Roeck <groeck@chromium.org> Cc: Mark Brown <broonie@kernel.org> Cc: linux-spi@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- drivers/platform/chrome/cros_ec_spi.c | 2 +- drivers/spi/spi.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/platform/chrome/cros_ec_spi.c +++ b/drivers/platform/chrome/cros_ec_spi.c @@ -706,7 +706,7 @@ static int cros_ec_spi_devm_high_pri_all struct cros_ec_spi *ec_spi) { struct sched_param sched_priority = { - .sched_priority = MAX_RT_PRIO - 1, + .sched_priority = MAX_RT_PRIO / 2, }; int err; --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1434,7 +1434,7 @@ static void spi_pump_messages(struct kth */ static void spi_set_thread_rt(struct spi_controller *ctlr) { - struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 }; + struct sched_param param = { .sched_priority = MAX_RT_PRIO / 2 }; dev_info(&ctlr->dev, "will run message pump with realtime priority\n");
| |