| Message ID | 1612498242-31579-1-git-send-email-anshuman.khandual@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mm/memtest: Add ARCH_USE_MEMTEST | expand |
On Thu, Feb 4, 2021 at 8:10 PM Anshuman Khandual <anshuman.khandual@arm.com> wrote: > > early_memtest() does not get called from all architectures. Hence enabling > CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel command line > option might not trigger the memory pattern tests as would be expected in > normal circumstances. This situation is misleading. > > The change here prevents the above mentioned problem after introducing a > new config option ARCH_USE_MEMTEST that should be subscribed on platforms > that call early_memtest(), in order to enable the config CONFIG_MEMTEST. > Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would > not be tested anyway. > > Cc: Russell King <linux@armlinux.org.uk> > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Will Deacon <will@kernel.org> > Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> > Cc: Michael Ellerman <mpe@ellerman.id.au> > Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> > Cc: Paul Mackerras <paulus@samba.org> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Ingo Molnar <mingo@redhat.com> > Cc: Chris Zankel <chris@zankel.net> > Cc: Max Filippov <jcmvbkbc@gmail.com> > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-mips@vger.kernel.org > Cc: linuxppc-dev@lists.ozlabs.org > Cc: linux-xtensa@linux-xtensa.org > Cc: linux-mm@kvack.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> > --- > This patch applies on v5.11-rc6 and has been tested on arm64 platform. But > it has been just build tested on all other platforms. > > arch/arm/Kconfig | 1 + > arch/arm64/Kconfig | 1 + > arch/mips/Kconfig | 1 + > arch/powerpc/Kconfig | 1 + > arch/x86/Kconfig | 1 + > arch/xtensa/Kconfig | 1 + > lib/Kconfig.debug | 9 ++++++++- > 7 files changed, 14 insertions(+), 1 deletion(-) Anshuman, entries in arch/*/Konfig files are sorted in alphabetical order, please keep them that way. Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Hi Anshuman, On 2/5/21 4:10 AM, Anshuman Khandual wrote: > early_memtest() does not get called from all architectures. Hence enabling > CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel command line > option might not trigger the memory pattern tests as would be expected in > normal circumstances. This situation is misleading. Documentation already mentions which architectures support that: memtest= [KNL,X86,ARM,PPC] Enable memtest yet I admit that not all reflected there > > The change here prevents the above mentioned problem after introducing a > new config option ARCH_USE_MEMTEST that should be subscribed on platforms > that call early_memtest(), in order to enable the config CONFIG_MEMTEST. > Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would > not be tested anyway. > Is that generic pattern? What about other cross arch parameters? Do they already use similar subscription or they rely on documentation? I'm not against the patch just want to check if things are consistent... Cheers Vladimir
On 2/5/21 1:05 PM, Max Filippov wrote: > On Thu, Feb 4, 2021 at 8:10 PM Anshuman Khandual > <anshuman.khandual@arm.com> wrote: >> >> early_memtest() does not get called from all architectures. Hence enabling >> CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel command line >> option might not trigger the memory pattern tests as would be expected in >> normal circumstances. This situation is misleading. >> >> The change here prevents the above mentioned problem after introducing a >> new config option ARCH_USE_MEMTEST that should be subscribed on platforms >> that call early_memtest(), in order to enable the config CONFIG_MEMTEST. >> Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would >> not be tested anyway. >> >> Cc: Russell King <linux@armlinux.org.uk> >> Cc: Catalin Marinas <catalin.marinas@arm.com> >> Cc: Will Deacon <will@kernel.org> >> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> >> Cc: Michael Ellerman <mpe@ellerman.id.au> >> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> >> Cc: Paul Mackerras <paulus@samba.org> >> Cc: Thomas Gleixner <tglx@linutronix.de> >> Cc: Ingo Molnar <mingo@redhat.com> >> Cc: Chris Zankel <chris@zankel.net> >> Cc: Max Filippov <jcmvbkbc@gmail.com> >> Cc: linux-arm-kernel@lists.infradead.org >> Cc: linux-mips@vger.kernel.org >> Cc: linuxppc-dev@lists.ozlabs.org >> Cc: linux-xtensa@linux-xtensa.org >> Cc: linux-mm@kvack.org >> Cc: linux-kernel@vger.kernel.org >> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> >> --- >> This patch applies on v5.11-rc6 and has been tested on arm64 platform. But >> it has been just build tested on all other platforms. >> >> arch/arm/Kconfig | 1 + >> arch/arm64/Kconfig | 1 + >> arch/mips/Kconfig | 1 + >> arch/powerpc/Kconfig | 1 + >> arch/x86/Kconfig | 1 + >> arch/xtensa/Kconfig | 1 + >> lib/Kconfig.debug | 9 ++++++++- >> 7 files changed, 14 insertions(+), 1 deletion(-) > > Anshuman, entries in arch/*/Konfig files are sorted in alphabetical order, > please keep them that way. Sure, will fix up and resend. > > Reviewed-by: Max Filippov <jcmvbkbc@gmail.com> >
On 2/5/21 2:50 PM, Vladimir Murzin wrote: > Hi Anshuman, > > On 2/5/21 4:10 AM, Anshuman Khandual wrote: >> early_memtest() does not get called from all architectures. Hence enabling >> CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel command line >> option might not trigger the memory pattern tests as would be expected in >> normal circumstances. This situation is misleading. > > Documentation already mentions which architectures support that: > > memtest= [KNL,X86,ARM,PPC] Enable memtest > > yet I admit that not all reflected there But there is nothing that prevents CONFIG_MEMTEST from being set on other platforms that do not have an affect, which is not optimal. > >> >> The change here prevents the above mentioned problem after introducing a >> new config option ARCH_USE_MEMTEST that should be subscribed on platforms >> that call early_memtest(), in order to enable the config CONFIG_MEMTEST. >> Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would >> not be tested anyway. >> > > Is that generic pattern? What about other cross arch parameters? Do they already > use similar subscription or they rely on documentation? Depending solely on the documentation should not be sufficient. > > I'm not against the patch just want to check if things are consistent... Not sure about other similar situations but those if present should get fixed as well.
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 138248999df7..a63b53c568df 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -32,6 +32,7 @@ config ARM select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_CMPXCHG_LOCKREF + select ARCH_USE_MEMTEST select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU select ARCH_WANT_IPC_PARSE_VERSION select ARCH_WANT_LD_ORPHAN_WARN diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index c4acf8230f20..dfee5831d876 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -70,6 +70,7 @@ config ARM64 select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS select ARCH_USE_SYM_ANNOTATIONS + select ARCH_USE_MEMTEST select ARCH_SUPPORTS_DEBUG_PAGEALLOC select ARCH_SUPPORTS_MEMORY_FAILURE select ARCH_SUPPORTS_SHADOW_CALL_STACK if CC_HAVE_SHADOW_CALL_STACK diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 0a17bedf4f0d..1b21d8e53e6b 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -16,6 +16,7 @@ config MIPS select ARCH_USE_CMPXCHG_LOCKREF if 64BIT select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS + select ARCH_USE_MEMTEST select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU select ARCH_WANT_IPC_PARSE_VERSION select BUILDTIME_TABLE_SORT diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 107bb4319e0e..9935343a8750 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -151,6 +151,7 @@ config PPC select ARCH_USE_CMPXCHG_LOCKREF if PPC64 select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS + select ARCH_USE_MEMTEST select ARCH_WANT_IPC_PARSE_VERSION select ARCH_WANT_IRQS_OFF_ACTIVATE_MM select ARCH_WANT_LD_ORPHAN_WARN diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 21f851179ff0..90545348db1b 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -100,6 +100,7 @@ config X86 select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS select ARCH_USE_SYM_ANNOTATIONS + select ARCH_USE_MEMTEST select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH select ARCH_WANT_DEFAULT_BPF_JIT if X86_64 select ARCH_WANTS_DYNAMIC_TASK_STRUCT diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 37ce1489364e..8eb61fcdfc7f 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -9,6 +9,7 @@ config XTENSA select ARCH_HAS_DMA_SET_UNCACHED if MMU select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS + select ARCH_USE_MEMTEST select ARCH_WANT_FRAME_POINTERS select ARCH_WANT_IPC_PARSE_VERSION select BUILDTIME_TABLE_SORT diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7937265ef879..6dd25b755a82 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2469,11 +2469,18 @@ config TEST_FPU endif # RUNTIME_TESTING_MENU +config ARCH_USE_MEMTEST + bool + help + An architecture should select this when it uses early_memtest() + during boot process. + config MEMTEST bool "Memtest" + depends on ARCH_USE_MEMTEST help This option adds a kernel parameter 'memtest', which allows memtest - to be set. + to be set and executed. memtest=0, mean disabled; -- default memtest=1, mean do 1 test pattern; ...
early_memtest() does not get called from all architectures. Hence enabling CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel command line option might not trigger the memory pattern tests as would be expected in normal circumstances. This situation is misleading. The change here prevents the above mentioned problem after introducing a new config option ARCH_USE_MEMTEST that should be subscribed on platforms that call early_memtest(), in order to enable the config CONFIG_MEMTEST. Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would not be tested anyway. Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mips@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-xtensa@linux-xtensa.org Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> --- This patch applies on v5.11-rc6 and has been tested on arm64 platform. But it has been just build tested on all other platforms. arch/arm/Kconfig | 1 + arch/arm64/Kconfig | 1 + arch/mips/Kconfig | 1 + arch/powerpc/Kconfig | 1 + arch/x86/Kconfig | 1 + arch/xtensa/Kconfig | 1 + lib/Kconfig.debug | 9 ++++++++- 7 files changed, 14 insertions(+), 1 deletion(-)