Sean Christopherson d2cbae37c3 KVM: x86: Zap the oldest MMU pages, not the newest ... commit 8fc517267fb28576dfca2380cc2497a2454b8fae upstream. Walk the list of MMU pages in reverse in kvm_mmu_zap_oldest_mmu_pages(). The list is FIFO, meaning new pages are inserted at the head and thus the oldest pages are at the tail. Using a "forward" iterator causes KVM to zap MMU pages that were just added, which obliterates guest performance once the max number of shadow MMU pages is reached. Fixes: 6b82ef2c9c ("KVM: x86/mmu: Batch zap MMU pages when recycling oldest pages") Reported-by: Zdenek Kaspar <zkaspar82@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210113205030.3481307-1-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-02-26 10:13:00 +01:00
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boot
configs
crypto
entry	x86/entry: Emit a symbol for register restoring thunk	2021-02-03 23:28:40 +01:00
events
hyperv
ia32
include	x86/apic: Add extra serialization for non-serializing MSRs	2021-02-10 09:29:22 +01:00
kernel	cpufreq: ACPI: Update arch scale-invariance max perf ratio if CPPC is not there	2021-02-17 11:02:29 +01:00
kvm	KVM: x86: Zap the oldest MMU pages, not the newest	2021-02-26 10:13:00 +01:00
lib	x86/mmx: Use KFPU_387 for MMX string operations	2021-01-27 11:55:13 +01:00
math-emu
mm	KVM: SVM: Treat SVM as unsupported when running as an SEV guest	2021-02-10 09:29:19 +01:00
net
oprofile
pci	x86/pci: Create PCI/MSI irqdomain after x86_init.pci.arch_init()	2021-02-17 11:02:28 +01:00
platform	x86/efi: Remove EFI PGD build time checks	2021-02-17 11:02:24 +01:00
power
purgatory
ras
realmode
tools
um
video
xen	Xen/x86: also check kernel mapping in set_foreign_p2m_mapping()	2021-02-23 15:53:24 +01:00
.gitignore
Kbuild
Kconfig
Kconfig.assembler
Kconfig.cpu
Kconfig.debug
Makefile	x86/build: Disable CET instrumentation in the kernel for 32-bit too	2021-02-17 11:02:27 +01:00
Makefile_32.cpu
Makefile.um