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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2011-09-06 17:41:47 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-09-08 13:59:06 -0400 |
| commit | f10cd522c5fbfec9ae3cc01967868c9c2401ed23 (patch) | |
| tree | fbcc48f2b46934a1ea3ec9f4807e6c32b868cc9c /arch/x86/xen/smp.c | |
| parent | ed467e69f16e6b480e2face7bc5963834d025f91 (diff) | |
| download | linux-f10cd522c5fbfec9ae3cc01967868c9c2401ed23.tar.gz linux-f10cd522c5fbfec9ae3cc01967868c9c2401ed23.tar.bz2 linux-f10cd522c5fbfec9ae3cc01967868c9c2401ed23.zip | |
xen: disable PV spinlocks on HVM
PV spinlocks cannot possibly work with the current code because they are
enabled after pvops patching has already been done, and because PV
spinlocks use a different data structure than native spinlocks so we
cannot switch between them dynamically. A spinlock that has been taken
once by the native code (__ticket_spin_lock) cannot be taken by
__xen_spin_lock even after it has been released.
Reported-and-Tested-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen/smp.c')
| -rw-r--r-- | arch/x86/xen/smp.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index d4fc6d454f8d..041d4fe9dfe4 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -532,7 +532,6 @@ static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus) WARN_ON(xen_smp_intr_init(0)); xen_init_lock_cpu(0); - xen_init_spinlocks(); } static int __cpuinit xen_hvm_cpu_up(unsigned int cpu) |