Re: [PATCH] tpm/eventlog: Use kvmalloc() for event log buffer

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On Thu Nov 7, 2024 at 2:17 PM EET, Paul Menzel wrote:
> Dear Takashi,
>
>
> Thank you for the patch.
>
> Am 07.11.24 um 12:18 schrieb Takashi Iwai:
> > The TPM2 ACPI table may request a large size for the event log, and it
> > may be over the max size of kmalloc().  When this happens, the driver
>
> What is kmalloc()’s maximum size?

For reference: https://elixir.bootlin.com/linux/v6.11.6/source/include/linux/slab.h#L367

So it would be 1UL << 22 i.e. 4 MB at least. Not sure if MAX_PAGE_ORDER
is larger than 10 on x86-64.

BR, Jarkko





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