Re: [PATCH RFC] x86: enable RCU based table free when PARAVIRT

2017-08-18 Thread Vitaly Kuznetsov
Juergen Gross writes: > On 17/08/17 11:20, Vitaly Kuznetsov wrote: >> On x86 software page-table walkers depend on the fact that remote TLB flush >> does an IPI: walk is performed lockless but with interrupts disabled and in >> case the pagetable is freed the freeing CPU will get blocked as remot

Re: [PATCH RFC] x86: enable RCU based table free when PARAVIRT

2017-08-18 Thread Juergen Gross
On 17/08/17 11:20, Vitaly Kuznetsov wrote: > On x86 software page-table walkers depend on the fact that remote TLB flush > does an IPI: walk is performed lockless but with interrupts disabled and in > case the pagetable is freed the freeing CPU will get blocked as remote TLB > flush is required. On