From: Nitin Gupta <[email protected]> Date: Tue, 29 Mar 2016 14:11:14 -0700
> During hugepage map/unmap, TSB and TLB flushes are currently > issued at every PAGE_SIZE'd boundary which is unnecessary. > We now issue the flush at REAL_HPAGE_SIZE boundaries only. > > Without this patch workloads which unmap a large hugepage > backed VMA region get CPU lockups due to excessive TLB > flush calls. > > Orabug: 22365539, 22643230, 22995196 > > Signed-off-by: Nitin Gupta <[email protected]> You really need to put some more work into this, there are lots of config variants you didn't even test. See the kbuild robot replies...
