On Thu, Oct 04 2007, Pierre Ossman wrote: > On Thu, 4 Oct 2007 11:30:14 +0200 > Jens Axboe <[EMAIL PROTECTED]> wrote: > > > On Thu, Oct 04 2007, Pierre Ossman wrote: > > > > > > I assume sg_init_one() still can work on an uninitialized sg entry? > > > > Yes, but only if that sg entry is not part of a chained list. > > > > Is that a yes or a no? You said that the ->page field was involved in
It's a conditional yes, re-read it :-) > list chaining, so does or doesn't it have to be initialized before a > call to sg_init_one()? That's not the problem. It has to be initialized before calling blk_rq_map_sg(). sg_init_one() will zero the entire sg entry, and that breaks if that particular sg entry is part of a larger sg table AND that sg entry happens to be the chain element. -- Jens Axboe - 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/
