diff options
| author | Tim Murray <timmurray@google.com> | 2016-01-19 16:36:40 -0800 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2016-04-07 16:49:52 +0530 |
| commit | 772de7be5b75e33a02d4ab79f0876fb868cf4242 (patch) | |
| tree | 53e7a22c3dd2da65ac54d45400603df0cc0a1fe3 | |
| parent | c455cc2a8f795d3bbafe8f076482fa3f23b9d77d (diff) | |
ANDROID: mmc: move to a SCHED_FIFO thread
(cherry picked from commit 011e507b413393eab8279dac8b778ad9b6e9971b)
Running mmcqd as a prio 120 thread forces it to compete with standard
user processes for IO performance, especially when the system is under
severe CPU load. Move it to a SCHED_FIFO thread to reduce the impact of
load on IO performance.
Signed-off-by: Tim Murray <timmurray@google.com>
Bug: 25392275
Change-Id: I1edfe73baa25e181367c30c1f40fee886e92b60d
| -rw-r--r-- | drivers/mmc/card/queue.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index 6f4323c6d653..6a4cd2bb4629 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -19,6 +19,7 @@ #include <linux/mmc/card.h> #include <linux/mmc/host.h> +#include <linux/sched/rt.h> #include "queue.h" #define MMC_QUEUE_BOUNCESZ 65536 @@ -50,6 +51,11 @@ static int mmc_queue_thread(void *d) { struct mmc_queue *mq = d; struct request_queue *q = mq->queue; + struct sched_param scheduler_params = {0}; + + scheduler_params.sched_priority = 1; + + sched_setscheduler(current, SCHED_FIFO, &scheduler_params); current->flags |= PF_MEMALLOC; |