[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Re: [PATCH] fix pgd_lock deadlock
On Tue, Feb 22, 2011 at 07:48:54AM +0000, Jan Beulich wrote: > A possible alternative would be to acquire the page table lock > in vmalloc_sync_all() only in the Xen case (perhaps by storing > NULL into page->index in pgd_set_mm() when not running on > Xen). This is utilizing the fact that there aren't (supposed to > be - for non-pvops this is definitely the case) any TLB flush IPIs > under Xen, and hence the race you're trying to fix doesn't > exist there (while non-Xen doesn't need the extra locking). That's sure ok with me. Can we use a global runtime to check if the guest is running under Xen paravirt, instead of passing that info through page->something? _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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