From: Mike Rapoport (IBM) <r...@kernel.org>
On Thu, 13 Jun 2024 11:55:06 -0400, Steven Rostedt wrote:
> Reserve unspecified location of physical memory from kernel command line
>
> Background:
>
> In ChromeOS, we have 1 MB of pstore ramoops reserved so that we can extract
> dmesg output and some other information when a crash happens in the field.
> (This is only done when the user selects "Allow Google to collect data for
> improving the system"). But there are cases when there's a bug that
> requires more data to be retrieved to figure out what is happening. We would
> like to increase the pstore size, either temporarily, or maybe even
> permanently. The pstore on these devices are at a fixed location in RAM (as
> the RAM is not cleared on soft reboots nor crashes). The location is chosen
> by the BIOS (coreboot) and passed to the kernel via ACPI tables on x86.
> There's a driver that queries for this to initialize the pstore for
> ChromeOS:
>
> [...]
Applied to for-next branch of memblock.git tree, thanks!
[0/2] mm/memblock: Add "reserve_mem" to reserved named memory at boot up
commit: 1e4c64b71c9bf230b25fde12cbcceacfdc8b3332
[1/2] mm/memblock: Add "reserve_mem" to reserved named memory at boot up
commit: 1e4c64b71c9bf230b25fde12cbcceacfdc8b3332
[2/2] pstore/ramoops: Add ramoops.mem_name= command line option
commit: d9d814eebb1ae9742e7fd7f39730653b16326bd4
tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
branch: for-next
--
Sincerely yours,
Mike.
