On 09/14/2015 01:47 AM, Julien Grall wrote: > > > On 13/09/2015 13:44, Bob Liu wrote: >> I may misunderstood here. >> But I think same changes are also required even if backend supports indirect >> grant when frontend is using 64KB page granularity. >> Else >> 1) How to set up the grant map for requests in domU? >> The minimum segment buffer size in a request is PAGE_SIZE(64KB) while grant >> is 4KB based. >> >> 2) Codes like below in blkback.c may not work correctly? >> if ((req->u.rw.seg[i].last_sect >= (PAGE_SIZE >> 9)) || >> >> Because PAGE_SIZE in backend is 4KB, while the written value by domU is 64KB >> based. > > As mention in my cover letter, this patch is not self-sufficient to support > 64KB guest. It's a follow-up of the 64KB page granularity support I sent on > the ML (the new version was sent earlier this week [1]). > > One of the patch [2] is taking care of breaking down the I/O request in > multiple 4KB segment that will be used in the ring request. You may want to > give a look to this patch before looking to this series. >
Oh, sorry! I'll have a look at those patches. Thanks, -Bob -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
