On Wed, 2021-09-15 at 13:30 -0700, Reinette Chatre wrote: > From: Jarkko Sakkinen <jarkko@xxxxxxxxxx> > > Just like normal memory, SGX memory can be overcommitted. SGX has its > own reclaim mechanism which kicks in when physical SGX memory (Enclave > Page Cache / EPC) is exhausted. That reclaim mechanism is relatively > rarely exercised and needs selftests to poke at it. > > The amount of EPC on the system is determined by the BIOS and it varies > wildly between systems. It can be dozens of MB on desktops, or many GB > on servers. > > To run in a reasonable amount of time, the selftest needs to know how > much EPC there is in the system. > > Introduce a new debugfs file to export that information. > > Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> > Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx> > [reinette: Use as placeholder patch until other discussions complete] > Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx> This could be replaced with the following two patches: https://lore.kernel.org/linux-sgx/20210914030422.377601-1-jarkko@xxxxxxxxxx/T/#t I forgot to CC this to you when I sent it, sorry about that. /Jarkko
