On 2/3/21 5:54 AM, Jarkko Sakkinen wrote:
On Mon, Feb 01, 2021 at 09:26:51PM +0800, Tianjia Zhang wrote:
'section->free_cnt' represents the free page in sgx_epc_section,
which is assigned once after initialization. In fact, just after the
initialization is completed, the pages are in the init_laundry_list
list and cannot be allocated. This needs to be recovered by EREMOVE
of function sgx_sanitize_section() before it can be used as a page
that can be allocated. The sgx_sanitize_section() will be called in
the kernel thread ksgxd.
This patch moves the initialization of 'section->free_cnt' from the
initialization function sgx_setup_epc_section() to the function
sgx_sanitize_section(), and then accumulates the count after the
successful execution of EREMOVE. This seems to be more reasonable,
free_cnt will also truly reflect the allocatable free pages in EPC.
Sined-off-by: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>
Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>
I just copy-paste my earlier response to save time sice you seem
to save time by ignoring it and spamming with the same obviously
illegit patch.
https://lore.kernel.org/linux-sgx/YBGlodsOaX4cWAtl@xxxxxxxxxx/
/Jarkko
Sorry for the late reply, I already responded in the original email.
Best regards,
Tianjia
