On Thu, Oct 03, 2013 at 02:49:09PM +0300, Adrian Hunter wrote: > You can boot with notsc and perf still seems to work > e.g. > > $ dmesg | grep -i tsc > [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.11.0+ > root=UUID=f1b4c71a-15aa-41a6-8898-cdde49966bce ro ignore_loglevel > earlyprintk=ttyS0 console=ttyS0,115200n8 no_console_suspend notsc=1 > [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.11.0+ > root=UUID=f1b4c71a-15aa-41a6-8898-cdde49966bce ro ignore_loglevel > earlyprintk=ttyS0 console=ttyS0,115200n8 no_console_suspend notsc=1 > [ 0.000000] tsc: Kernel compiled with CONFIG_X86_TSC, cannot disable TSC > completely > [ 0.000000] tsc: Fast TSC calibration using PIT > [ 0.004000] tsc: Detected 2593.932 MHz processor > [ 0.224000] TSC deadline timer enabled
Yeah, and we still use the TSC deadline timer too.. I think we should seriously consider removing the notsc option. I really don't know what its good for. Thomas, Ingo, hpa? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
