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| author | Maciej S. Szmigiero <maciej.szmigiero@oracle.com> | 2021-12-06 20:54:28 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-12-08 10:24:32 +0100 |
| commit | ed922739c9199bf515a3e7fec3e319ce1edeef2a (patch) | |
| tree | 287fba29b9f4f72147c4db889723274e3e7269f1 /arch/s390 | |
| parent | KVM: Resolve memslot ID via a hash table instead of via a static array (diff) | |
| download | linux-ed922739c9199bf515a3e7fec3e319ce1edeef2a.tar.xz linux-ed922739c9199bf515a3e7fec3e319ce1edeef2a.zip | |
KVM: Use interval tree to do fast hva lookup in memslots
The current memslots implementation only allows quick binary search by gfn,
quick lookup by hva is not possible - the implementation has to do a linear
scan of the whole memslots array, even though the operation being performed
might apply just to a single memslot.
This significantly hurts performance of per-hva operations with higher
memslot counts.
Since hva ranges can overlap between memslots an interval tree is needed
for tracking them.
[sean: handle interval tree updates in kvm_replace_memslot()]
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Message-Id: <d66b9974becaa9839be9c4e1a5de97b177b4ac20.1638817640.git.maciej.szmigiero@oracle.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kvm/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig index 67a8e770e369..2e84d3922f7c 100644 --- a/arch/s390/kvm/Kconfig +++ b/arch/s390/kvm/Kconfig @@ -33,6 +33,7 @@ config KVM select HAVE_KVM_NO_POLL select SRCU select KVM_VFIO + select INTERVAL_TREE help Support hosting paravirtualized guest machines using the SIE virtualization capability on the mainframe. This should work |