> On Apr 10, 2024, at 3:55 AM, Luck, Tony <tony.luck@xxxxxxxxx> wrote: > > >> >>> I forgot to mention that this makes it trivial for any machine that doesn't >>> clear memory on soft-reboot, to enable console ramoops (to have access to >>> the last boot dmesg without needing serial). >>> >>> I tested this on a couple of my test boxes and on QEMU, and it works rather >>> well. >> >> I've long wanted a "stable for this machine and kernel" memory region >> like this for pstore. It would make testing much easier. > > Which systems does this work on? I'd assume that servers (and anything > else with ECC memory) would nuke contents while resetting ECC to clean > state. If that were the case universally, then ramoops pstore backend would not work either? And yet we get the last kernel logs via the pstore for many years now, on embedded-ish devices. >From my reading, ECC-enabled DRAM is not present on lots of systems and IIRC, pstore ramoops has its own ECC. Or did I miss a recent trend with ECC-enabled DRAM? - Joel > > -Tony
