[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xen: Fix possible page fault in fifo events
On 15/07/14 14:48, Frediano Ziglio wrote: > sync_test_bit function require a long* read access to pointer. > This is a problem if the you are using last entry in the page causing > an access to next page. If this page is not readable you get a memory > access failure (page fault). > All other x64 bit functions access memory using 32 bit operations. > For processors different than x64 long aligned operations are used. I think we should implement a set of 32-bit bit ops. We fudged around it for the arm64 problem but this second problem shows we need a better solution. David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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