On Mon, 14 May 2007 14:06:19 -0400 Theodore Tso <tytso@xxxxxxx> wrote: > On Sun, May 13, 2007 at 10:46:30PM -0700, Andrew Morton wrote: > > otoh, the intersection between pages which are PageBooked() and pages which > > are PageLazyFree() should be zreo, so it'd be good to actually formalise > > this reuse within the ext4 patches. > > > > otoh2, PageLazyFree() could have reused PG_owner_priv_1. > > > > Rik, Ted: any thoughts? We do need to scrimp on page flags: when we > > finally run out, we're screwed. > > It makes sense to me. PG_lazyfree is currently only in -mm, right? Ah, yes, I got confused, sorry. > I > don't see it in my git tree. It would probably would be a good idea > to make sure that we check to add some sanity checking code if it > isn't there already that PG_lazyfree isn't already set when try to set > PG_lazyfree (just in case there is a bug in the future which causes > the should-never-happen case of trying lazy free a PageBooked page). > Actually, I think the current status of lazy-freeing-of-memory-through-madv_free.patch is "might not be needed". I _think_ we've determined that 0a27a14a62921b438bb6f33772690d345a089be6 sufficiently fixed the perfomance problems we had in there? - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
