search for: tlbflush_timestamp

Hi, page->tlbflush_timestamp is used to filter and flush the TLB whenever type change of page happens. But why does xen flush TLB upon the type change? And we already know that guest kernel will flush the TLB in order to make the page table modifications take effect. Thanks! Best regards, Sam ________________________...

...int node, unsigned int order, unsigned int memflags) { if ( pg[i].u.free.need_tlbflush ) { /* Add in extra CPUs that need flushing because of this page. */ cpus_andnot(extra_cpus_mask, cpu_online_map, mask); tlbflush_filter(extra_cpus_mask, pg[i].tlbflush_timestamp); cpus_or(mask, mask, extra_cpus_mask); } } 1 in the first starting, most of need_tlbflush=NULL, so cost little; in the second one, most of RAM have been used thus makes need_tlbflush=true, so cost much. 2 but I repeated the same experiment in another blade which contains...

With pretty trivial user mode programs being able to crash the kernel due to the ref counter widths in Xen being more narrow than in Linux, I started an attempt to put together a kernel side fix. While addressing the plain hypercalls is pretty strait forward, dealing with multicalls (both when using them for lazy mmu mode batching and when explicitly using them in e.g. netback - the backends are

Hello everyone, this is the fourth version of the patch series that introduces ARMv7 with virtualization extensions support in Xen. The series allows Xen and Dom0 to boot on a Cortex-A15 based Versatile Express simulator. See the following announce email for more informations about what we are trying to achieve, as well as the original git history: See

Hello everyone, this is the very first version of the patch series that introduces ARMv7 with virtualization extensions support in Xen. The series allows Xen and Dom0 to boot on a Cortex-A15 based Versatile Express simulator. See the following announce email for more informations about what we are trying to achieve, as well as the original git history: See