Re: [PATCH V12] mm/debug: Add tests validating architecture page table helpers
From: Christophe Leroy <hidden>
Date: 2020-02-03 15:14:30
Also in:
linux-mips, linux-mm, linux-s390, linux-sh, linuxppc-dev, lkml, sparclinux
Le 02/02/2020 à 12:26, Qian Cai a écrit :
quoted
On Jan 30, 2020, at 9:13 AM, Christophe Leroy [off-list ref] wrote: config DEBUG_VM_PGTABLE bool "Debug arch page table for semantics compliance" if ARCH_HAS_DEBUG_VM_PGTABLE || EXPERT depends on MMU default 'n' if !ARCH_HAS_DEBUG_VM_PGTABLE default 'y' if DEBUG_VMDoes it really necessary to potentially force all bots to run this? Syzbot, kernel test robot etc? Does it ever pay off for all their machine times there?
Machine time ? On a 32 bits powerpc running at 132 MHz, the tests takes less than 10ms. Is it worth taking the risk of not detecting faults by not selecting it by default ? [ 5.656916] debug_vm_pgtable: debug_vm_pgtable: Validating architecture page table helpers [ 5.665661] debug_vm_pgtable: debug_vm_pgtable: Validated architecture page table helpers Christophe _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel