On Mon, Aug 27, 2018 at 9:58 PM Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx> wrote: > > Add a Enclave Page Cache (EPC) memory manager that can be used to > allocate and free EPC pages. The swapper thread ksgxswapd reclaims pages > on the event when the number of free EPC pages goes below > %SGX_NR_LOW_PAGES up until it reaches %SGX_NR_HIGH_PAGES. > > Pages are reclaimed in LRU fashion from a global list. The consumers > take care of calling EBLOCK (block page from new accesses), ETRACK > (restart counting the entering hardware threads) and EWB (write page to > the regular memory) because executing these operations usually (if not > always) requires to do some subsystem-internal locking operations. > + list_del(&page->list); Is this page will be completely gone? Otherwise it might be needed to reinit list head here as well. > + WARN(ret < 0, "sgx: cannot free page, reclaim in-progress"); > + WARN(ret > 0, "sgx: EREMOVE returned %d (0x%x)", ret, ret); I'm not sure (though it's easy to check) that you need sgx: prefix here. WARN() might take pr_fmt() if defined. -- With Best Regards, Andy Shevchenko
