On Thu, 30 Oct, at 03:11:36PM, Mathieu Desnoyers wrote: > > Hi Kirill, > > This is a good point, > > There are a few more aspects to consider here: > > - Other architectures appear to have different guarantees, for > instance ARM which, AFAIK, does not reset memory on soft > reboot (well at least for my customer's boards). So I guess > if x86 wants to be competitive, it would be good for them to > offer a similar feature, > > - Already having a subset of machines supporting this is useful, > e.g. storing trace buffers and recovering them after a crash, > > - Since we are in a world of dynamically upgradable BIOS, perhaps > if we can show that there is value in having a BIOS option to > specify a memory range that should not be reset on soft reboot, > BIOS vendors might be inclined to include an option for it, > > - Perhaps UEFI BIOS already have some way of specifying that a > memory range should not be reset on soft reboot ? We've achieved this in the past using UEFI capsules with the EFI_CAPSULE_PERSIST_ACROSS_RESET header flag. Unfortunately, runtime capsule support is pretty spotty, so it's not a general solution right now. -- Matt Fleming, Intel Open Source Technology Center -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>