On 09/01/14 16:30, Wei Liu wrote: > On Wed, Jan 08, 2014 at 12:10:10AM +0000, Zoltan Kiss wrote: >> This patch contains the new definitions necessary for grant mapping. >> >> v2: >> - move unmapping to separate thread. The NAPI instance has to be scheduled >> even from thread context, which can cause huge delays >> - that causes unfortunately bigger struct xenvif >> - store grant handle after checking validity >> >> v3: >> - fix comment in xenvif_tx_dealloc_action() >> - call unmap hypercall directly instead of gnttab_unmap_refs(), which does >> unnecessary m2p_override. Also remove pages_to_[un]map members > > Is it worthy to have another function call > gnttab_unmap_refs_no_m2p_override in Xen core driver, or just add a > parameter to control wether we need to touch m2p_override? I *think* it > will benefit block driver as well?
Anthony Liguori posted a patch to perform something similar in blkback, but I think the patch never made it upstream: https://lkml.org/lkml/2013/11/12/749 Probably a good time to revisit it so this mechanism can be used by both blkback and netback? Roger. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
