From eea999d7487ac5b48ce48d4be60b7c7377aae7df Mon Sep 17 00:00:00 2001 From: Tim Murray Date: Tue, 19 Jan 2016 16:36:40 -0800 Subject: [PATCH] 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 Bug: 25392275 Change-Id: I1edfe73baa25e181367c30c1f40fee886e92b60d --- drivers/mmc/card/queue.c | 6 ++++++ 1 file changed, 6 insertions(+) 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 #include +#include #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; -- 2.34.1