Messages in this thread Patch in this message | | | Subject | [PATCH] sched_clock vs tsc_disable | From | Rusty Russell <> | Date | Fri, 18 May 2007 12:42:23 +1000 |
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(Not sure who's code this is, but it's in 2.6.22-rc1-mm1):
If you set tsc_disable (eg "notsc" on cmdline), sched-clock.c gives a divide by zero on boot.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff -r fd2ae7085ca2 arch/i386/kernel/sched-clock.c --- a/arch/i386/kernel/sched-clock.c Fri May 18 11:04:27 2007 +1000 +++ b/arch/i386/kernel/sched-clock.c Fri May 18 12:12:24 2007 +1000 @@ -103,7 +103,7 @@ static void resync_sc_freq(struct sc_dat static void resync_sc_freq(struct sc_data *sc, unsigned int newfreq) { sc->sync_base = jiffies; - if (!cpu_has_tsc) { + if (!cpu_has_tsc || tsc_disable) { sc->unstable = 1; return; }
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