Re: [PATCH] x86/sgx: Fix deadloop in __sgx_alloc_epc_page()
From: Huang, Kai
Date: Thu Aug 29 2024 - 03:56:58 EST
Actually run spell check this time ...
On Thu, 2024-08-29 at 10:38 +0800, Aaron Lu wrote:
> When current node doesn't have a EPC section configured by firmware and
"current node" -> "the current node"
"a EPC section" -> "an EPC section"
> all other EPC sections memory are used up, CPU can stuck inside the
"EPC sections memory" -> "EPC sections"
"can stuck" -> "can get stuck"
> while loop in __sgx_alloc_epc_page() forever and soft lockup will happen.
> Note how nid_of_current will never equal to nid in that while loop because
> nid_of_current is not set in sgx_numa_mask.
>
> Also worth mentioning is that it's perfectly fine for firmware to not
> seup an EPC section on a node. Setting an EPC section on each node can
> be good for performance but that's not a requirement functionality wise.
>
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