On Wed, Dec 01, 2021 at 11:23:22AM -0800, Reinette Chatre wrote: > The page reclaimer ensures availability of EPC pages across all > enclaves. In support of this it runs independently from the individual > enclaves in order to take locks from the different enclaves as it writes > pages to swap. > > When needing to load a page from swap an EPC page needs to be available for > its contents to be loaded into. Loading an existing enclave page from swap > does not reclaim EPC pages directly if none are available, instead the > reclaimer is woken when the available EPC pages are found to be below a > watermark. > > When iterating over a large number of pages in an oversubscribed > environment there is a race between the reclaimer woken up and EPC pages > reclaimed fast enough for the page operations to proceed. > > Instead of tuning the race between the page operations and the reclaimer > the page operations instead makes sure that there are EPC pages available. > > Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx> Why this needs to be part of this patch set? /Jarkko
