Messages in this thread Patch in this message | | | Date | Thu, 01 Aug 2019 13:13:52 +0200 | From | Peter Zijlstra <> | Subject | [PATCH 4/5] media/ivtv: Reduce default FIFO priority |
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The ivtv driver creates a FIFO-99 thread by default, reduce this to FIFO-1.
FIFO-99 is the very highest priority available to SCHED_FIFO and it not a suitable default; it would indicate the ivtv work is the most important work on the machine.
FIFO-1 gets it above all OTHER tasks, which seems high enough lacking better justification.
Cc: Andy Walls <awalls@md.metrocast.net> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: linux-media@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- drivers/media/pci/ivtv/ivtv-driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/media/pci/ivtv/ivtv-driver.c +++ b/drivers/media/pci/ivtv/ivtv-driver.c @@ -738,7 +738,7 @@ static void ivtv_process_options(struct */ static int ivtv_init_struct1(struct ivtv *itv) { - struct sched_param param = { .sched_priority = 99 }; + struct sched_param param = { .sched_priority = 1 }; itv->base_addr = pci_resource_start(itv->pdev, 0); itv->enc_mbox.max_mbox = 2; /* the encoder has 3 mailboxes (0-2) */
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