On Sep 3, 2013, at 3:39 AM, Roger Pau Monné <roger....@citrix.com> wrote:
> On 02/09/13 22:03, Justin T. Gibbs wrote: >> On Sep 2, 2013, at 11:58 AM, Roger Pau Monné <roger....@citrix.com> wrote: >> >>> Hello, >>> >>> While playing with driver domains using FreeBSD I've found out that >>> blkback in FreeBSD makes assumptions about the id of a request instead >>> of actually using the id of the request on the shared ring. This seems >>> wrong to me, since a frontend might choose whatever ids it like for the >>> requests (like using 100-131 instead of 0-31). The patch attached fixes >>> it by copying the id from the request on the ring to blkback internal >>> request structure. >>> >>> Roger. >> >> It looks to me like the id is set in xbb_dispatch_io(). Why it is done there >> and not earlier, I don't recall. > > Sorry, I've missed to spot that the id is set there, the problem is that > requests of type BLKIF_OP_FLUSH_DISKCACHE never reach that point, so > they end up having incorrect requests ids. I've reworded the commit > message and removed the late setting of the request id, now it is set > earlier so requests of type flush also have a valid id when writing the > response on the ring. Makes sense. Committed. -- Justin _______________________________________________ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
