On Mon, 21 Mar 2011, Benjamin Herrenschmidt wrote: > > As long as the races to avoid are between map/unmap vs. access, yes, it > -should- be fine, and we used to not do demand faulting on kernel space > (but for how long ?). I'm wondering why we don't just stick a ptl in > there or is there a good reason why we can't ?
We can - but we usually prefer to avoid unnecessary locking. An arch function which locks init_mm.page_table_lock on powerpc, but does nothing on others? Hugh _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
