Nadav Amit 4ce94eabac x86/mm/tlb: Flush remote and local TLBs concurrently ... To improve TLB shootdown performance, flush the remote and local TLBs concurrently. Introduce flush_tlb_multi() that does so. Introduce paravirtual versions of flush_tlb_multi() for KVM, Xen and hyper-v (Xen and hyper-v are only compile-tested). While the updated smp infrastructure is capable of running a function on a single local core, it is not optimized for this case. The multiple function calls and the indirect branch introduce some overhead, and might make local TLB flushes slower than they were before the recent changes. Before calling the SMP infrastructure, check if only a local TLB flush is needed to restore the lost performance in this common case. This requires to check mm_cpumask() one more time, but unless this mask is updated very frequently, this should impact performance negatively. Signed-off-by: Nadav Amit <namit@vmware.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> # Hyper-v parts Reviewed-by: Juergen Gross <jgross@suse.com> # Xen and paravirt parts Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/r/20210220231712.2475218-5-namit@vmware.com		2021-03-06 12:59:10 +01:00
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common.h	x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE	2020-06-11 15:15:16 +02:00
exceptions.h	treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively	2019-04-09 14:19:06 +02:00
fpu.h	x86/fpu: Defer FPU state load until return to userspace	2019-04-12 19:34:47 +02:00
hyperv.h	x86/mm/tlb: Flush remote and local TLBs concurrently	2021-03-06 12:59:10 +01:00
irq_vectors.h	x86/entry: Convert reschedule interrupt to IDTENTRY_SYSVEC_SIMPLE	2020-06-11 15:15:16 +02:00