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| author | Colin Percival <cperciva@FreeBSD.org> | 2010-11-22 09:13:25 +0000 |
|---|---|---|
| committer | Colin Percival <cperciva@FreeBSD.org> | 2010-11-22 09:13:25 +0000 |
| commit | aa519c0a64413adba86f8c917e1e59d66b60ebe8 (patch) | |
| tree | 7eeada262b358d7d01b66418e625a174d131b1a4 /sys/kern | |
| parent | bb63fdde6dbfd6d953b1c7547237dfcfae8d9364 (diff) | |
| download | src-aa519c0a64413adba86f8c917e1e59d66b60ebe8.tar.gz src-aa519c0a64413adba86f8c917e1e59d66b60ebe8.zip | |
Notes
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/kern_tc.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sys/kern/kern_tc.c b/sys/kern/kern_tc.c index 3e8d47067942..2487b6b5a9db 100644 --- a/sys/kern/kern_tc.c +++ b/sys/kern/kern_tc.c @@ -442,6 +442,16 @@ tc_windup(void) ncount = 0; th->th_offset_count += delta; th->th_offset_count &= th->th_counter->tc_counter_mask; + while (delta > th->th_counter->tc_frequency) { + /* Eat complete unadjusted seconds. */ + delta -= th->th_counter->tc_frequency; + th->th_offset.sec++; + } + if ((delta > th->th_counter->tc_frequency / 2) && + (th->th_scale * delta < (uint64_t)1 << 63)) { + /* The product th_scale * delta just barely overflows. */ + th->th_offset.sec++; + } bintime_addx(&th->th_offset, th->th_scale * delta); /* |