From 79bbad27d3d2da8c0a5baece99207f042bb1959a Mon Sep 17 00:00:00 2001 From: Hollis Blanchard Date: Wed, 21 Mar 2007 17:02:59 -0500 Subject: [PATCH] [POWERPC][XEN] Quiet timebase synchronization at boot. Signed-off-by: Hollis Blanchard --- xen/arch/powerpc/smp-tbsync.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/xen/arch/powerpc/smp-tbsync.c b/xen/arch/powerpc/smp-tbsync.c index 052249a311..c45278cc35 100644 --- a/xen/arch/powerpc/smp-tbsync.c +++ b/xen/arch/powerpc/smp-tbsync.c @@ -32,6 +32,13 @@ #define NUM_ITER 300 +#undef DEBUG +#ifdef DEBUG +#define DBG(fmt...) printk(fmt) +#else +#define DBG(fmt...) +#endif + enum { kExit=0, kSetAndTest, kTest }; @@ -128,7 +135,7 @@ void __devinit smp_generic_give_timebase(void) { int i, score, score2, old, min=0, max=5000, offset=1000; - printk("Synchronizing timebase\n"); + printk("Synchronizing timebase...\n"); /* if this fails then this kernel won't work anyway... */ tbsync = kmalloc( sizeof(*tbsync), GFP_KERNEL ); @@ -139,13 +146,13 @@ void __devinit smp_generic_give_timebase(void) while (!tbsync->ack) barrier(); - printk("Got ack\n"); + DBG("Got ack\n"); /* binary search */ for (old = -1; old != offset ; offset = (min+max) / 2) { score = start_contest(kSetAndTest, offset, NUM_ITER); - printk("score %d, offset %d\n", score, offset ); + DBG("score %d, offset %d\n", score, offset ); if( score > 0 ) max = offset; @@ -156,7 +163,7 @@ void __devinit smp_generic_give_timebase(void) score = start_contest(kSetAndTest, min, NUM_ITER); score2 = start_contest(kSetAndTest, max, NUM_ITER); - printk("Min %d (score %d), Max %d (score %d)\n", + DBG("Min %d (score %d), Max %d (score %d)\n", min, score, max, score2); score = abs(score); score2 = abs(score2); @@ -171,7 +178,7 @@ void __devinit smp_generic_give_timebase(void) if (score2 <= score || score2 < 20) break; } - printk("Final offset: %d (%d/%d)\n", offset, score2, NUM_ITER ); + DBG("Final offset: %d (%d/%d)\n", offset, score2, NUM_ITER ); /* exiting */ tbsync->cmd = kExit; -- 2.30.2