On Fri, 2007-07-27 at 12:01 +1000, Benjamin Herrenschmidt wrote: > Some architectures like sparc can do useful optimizations when knowing > that an entire MM is being destroyed. At the moment, they rely on > fullmm in the mmu_gather structure. However, that doesn't always work > out very well with some of the changes we are doing. Among other things, > the TLB flushing on sparc64 is done using per-CPU tracking data, making > the batch not per-CPU will break that link. > > So instead, we add a new flag to struct mm_struct that indicates that > the mm is going away, for those archs to use. It also allows to use it > in situations (such as PTE ops) where the batch isn't accessible (or > there is no batch)
And the patch forgets to clear it in mm_init ... will send a new one later. Cheers, Ben. - 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/
