Quoting Chris Wilson (2017-08-22 18:38:28) > We use WC pages for coherent writes into the ppGTT on !llc > architectures. However, to create a WC page requires a stop_machine(), > i.e. is very slow. To compensate we currently keep a per-vm cache of > recently freed pages, but we still see the slow startup of new contexts. > We can amoritize that cost slightly by allocating WC pages in small > batches (PAGEVEC_SIZE == 14) and since creating a WC page implies a > stop_machine() there is no penalty for keeping that stash global. > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx> And pushed. I didn't split out the new dependency on struct_mutex to a different mutex in the end, a task for later! -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
