Sean Christopherson ebdb292dac KVM: x86/mmu: Batch zap MMU pages when shrinking the slab ... Use the recently introduced kvm_mmu_zap_oldest_mmu_pages() to batch zap MMU pages when shrinking a slab. This fixes a long standing issue where KVM's shrinker implementation is completely ineffective due to zapping only a single page. E.g. without batch zapping, forcing a scan via drop_caches basically has no impact on a VM with ~2k shadow pages. With batch zapping, the number of shadow pages can be reduced to a few hundred pages in one or two runs of drop_caches. Note, if the default batch size (currently 128) is problematic, e.g. zapping 128 pages holds mmu_lock for too long, KVM can bound the batch size by setting @batch in mmu_shrinker. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Message-Id: <20200623193542.7554-4-sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2020-07-08 16:21:52 -04:00
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mmu.c	KVM: x86/mmu: Batch zap MMU pages when shrinking the slab	2020-07-08 16:21:52 -04:00
page_track.c	KVM: x86/mmu: Drop KVM's hugepage enums in favor of the kernel's enums	2020-05-15 12:26:11 -04:00
paging_tmpl.h	KVM: x86/mmu: Make .write_log_dirty a nested operation	2020-07-08 16:21:38 -04:00