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| author |  Boris Ostrovsky <boris.ostrovsky@oracle.com>
| 2017-09-11 14:51:11 -0400 |
|---|---|---|
| committer |  Thomas Gleixner <tglx@linutronix.de>
| 2017-09-25 15:22:45 +0200 |
| commit | ccb64941f375a6eb21b1b20136730eb7d1716068 (patch) | |
| tree | 7a2a352e6fb02667f4219438e7ea919a04a521da /arch/x86/kernel/tsc_sync.c | |
| parent | x86/timers: Make recalibrate_cpu_khz() void (diff) | |
| download | linux-ccb64941f375a6eb21b1b20136730eb7d1716068.tar.gz linux-ccb64941f375a6eb21b1b20136730eb7d1716068.tar.bz2 linux-ccb64941f375a6eb21b1b20136730eb7d1716068.zip | |
x86/timers: Move simple_udelay_calibration() past kvmclock_init()
simple_udelay_calibration() relies on x86_platform's calibration ops.
For KVM these ops are set late in setup_arch() and so
simple_udelay_calibration() ends up using native version.
Besides being possibly incorrect, this significantly increases kernel
boot time. For example, on my laptop executing start_kernel() by a guest
takes ~10 times more than when KVM's ops are used.
Since early_xdbc_setup_hardware() relies on calibration having been
performed move it too.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: baolu.lu@linux.intel.com
Link: https://lkml.kernel.org/r/20170911185111.20636-1-boris.ostrovsky@oracle.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/tsc_sync.c')
0 files changed, 0 insertions, 0 deletions