diff options
| author | Andrew Morton <akpm@digeo.com> | 2003-02-24 17:04:59 -0800 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2003-02-24 17:04:59 -0800 |
| commit | 8542637fa47a145ac165d24b4cb2105df1aa2bd0 (patch) | |
| tree | fd62e03b392045d330cbd119ad9b7591f294357c /kernel | |
| parent | eaa535e77e30ccdb5c3439041972c612f9c88c72 (diff) | |
[PATCH] make jiffies wrap 5 min after boot
From Tim Schmielau <tim@physik3.uni-rostock.de>
Force jiffies to start out at five-minutes-before-wrap. To find
jiffy-wrapping bugs.
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/timer.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index cabdff7716e7..6e7e23cb95ba 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -757,7 +757,7 @@ static inline void calc_load(unsigned long ticks) } /* jiffies at the most recent update of wall time */ -unsigned long wall_jiffies; +unsigned long wall_jiffies = INITIAL_JIFFIES; /* * This read-write spinlock protects us from races in SMP while @@ -1104,7 +1104,7 @@ asmlinkage long sys_sysinfo(struct sysinfo *info) do { seq = read_seqbegin(&xtime_lock); - uptime = jiffies_64; + uptime = jiffies_64 - INITIAL_JIFFIES; do_div(uptime, HZ); val.uptime = (unsigned long) uptime; @@ -1180,6 +1180,13 @@ static void __devinit init_timers_cpu(int cpu) } for (j = 0; j < TVR_SIZE; j++) INIT_LIST_HEAD(base->tv1.vec + j); + + base->timer_jiffies = INITIAL_JIFFIES; + base->tv1.index = INITIAL_JIFFIES & TVR_MASK; + base->tv2.index = (INITIAL_JIFFIES >> TVR_BITS) & TVN_MASK; + base->tv3.index = (INITIAL_JIFFIES >> (TVR_BITS+TVN_BITS)) & TVN_MASK; + base->tv4.index = (INITIAL_JIFFIES >> (TVR_BITS+2*TVN_BITS)) & TVN_MASK; + base->tv5.index = (INITIAL_JIFFIES >> (TVR_BITS+3*TVN_BITS)) & TVN_MASK; } static int __devinit timer_cpu_notify(struct notifier_block *self, |