> > > > The first time the breakpoint is hit on a page, it replaces the text > > page with anon page. Now lets assume we insert breakpoints in all the > > pages in a range. Here each page is individually replaced by a non THP > > anonpage. (since we dont have bulk breakpoint insertion support, > > breakpoint insertion happens one at a time). Now the only interesting > > case may be when each of these replaced pages happen to be physically > > contiguous so that THP kicks in to replace all of these pages with one > > THP page. Can happen in practice? > > > > Are there any other cases that I have missed? > > We use a hack in our applications where we open /proc/self/maps, copy > text segments to a staging area, then create overlay anon mappings on > top and copy the text back into them. Now we have THP-backed text and > very little iTLB pressure :-) > > That said, we haven't run into the uprobes issue yet. >
Thanks Johannes, Kirill, Rik. Reviewed-by: Srikar Dronamraju <sri...@linux.vnet.ibm.com>
