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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCHv2 0/2] xen/privcmd: support for paged-out frames
On 29/08/12 17:23, Ian Campbell wrote: > On Wed, 2012-08-29 at 14:15 +0100, David Vrabel wrote: >> This series is a straight forward-port of some functionality from >> classic kernels to support Xen hosts that do paging of guests. >> >> This isn't functionality the XenServer makes use of so I've not tested >> these with paging in use. >> >> Changes since v1: >> >> - Don't change PRIVCMD_MMAPBATCH (except to #define a constant for the >> error). It's broken and not really fixable sensibly and libxc will >> use V2 if it is available. >> - Return -ENOENT if all failures were -ENOENT. > > Is this behaviour a requirement from something? It's the behaviour libxc is expecting. It doesn't retry unless errno == ENOENT. > Usually hypercalls of this type return a global error only if something > went wrong with the general mechanics of the hypercall (e.g. faults > reading arguments etc) and leave reporting of the individual failures of > subops to the op specific field, even if all the subops fail in the same > way. I didn't design this interface... Feel free to propose (and implement) an alternate MMAPBATCH_V3 interface. David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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