https://github.com/torvalds/linux
Revision 8795359e35bc33bf86b6d0765aa7f37431db3b9c authored by Reinette Chatre on 08 February 2022, 18:48:07 UTC, committed by Dave Hansen on 10 February 2022, 23:58:14 UTC
Vijay reported that the "unclobbered_vdso_oversubscribed" selftest triggers the softlockup detector. Actual SGX systems have 128GB of enclave memory or more. The "unclobbered_vdso_oversubscribed" selftest creates one enclave which consumes all of the enclave memory on the system. Tearing down such a large enclave takes around a minute, most of it in the loop where the EREMOVE instruction is applied to each individual 4k enclave page. Spending one minute in a loop triggers the softlockup detector. Add a cond_resched() to give other tasks a chance to run and placate the softlockup detector. Cc: stable@vger.kernel.org Fixes: 1728ab54b4be ("x86/sgx: Add a page reclaimer") Reported-by: Vijay Dhanraj <vijay.dhanraj@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko@kernel.org> (kselftest as sanity check) Link: https://lkml.kernel.org/r/ced01cac1e75f900251b0a4ae1150aa8ebd295ec.1644345232.git.reinette.chatre@intel.com
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Tip revision: 8795359e35bc33bf86b6d0765aa7f37431db3b9c authored by Reinette Chatre on 08 February 2022, 18:48:07 UTC
x86/sgx: Silence softlockup detection when releasing large enclaves
x86/sgx: Silence softlockup detection when releasing large enclaves
Tip revision: 8795359
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Makefile | -rw-r--r-- | 63.5 KB |
README | -rw-r--r-- | 727 bytes |
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