From: Kefeng Wang <wangkefeng.wang@huawei.com> To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Andrey Ryabinin <ryabinin.a.a@gmail.com>, Andrey Konovalov <andreyknvl@gmail.com>, Dmitry Vyukov <dvyukov@google.com> Cc: <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <kasan-dev@googlegroups.com>, <linux-mm@kvack.org>, Kefeng Wang <wangkefeng.wang@huawei.com> Subject: [PATCH v2 0/3] arm64: support page mapping percpu first chunk allocator Date: Tue, 20 Jul 2021 10:51:02 +0800 [thread overview] Message-ID: <20210720025105.103680-1-wangkefeng.wang@huawei.com> (raw) Percpu embedded first chunk allocator is the firstly option, but it could fails on ARM64, eg, "percpu: max_distance=0x5fcfdc640000 too large for vmalloc space 0x781fefff0000" "percpu: max_distance=0x600000540000 too large for vmalloc space 0x7dffb7ff0000" "percpu: max_distance=0x5fff9adb0000 too large for vmalloc space 0x5dffb7ff0000" then we could meet "WARNING: CPU: 15 PID: 461 at vmalloc.c:3087 pcpu_get_vm_areas+0x488/0x838", even the system could not boot successfully. Let's implement page mapping percpu first chunk allocator as a fallback to the embedding allocator to increase the robustness of the system. Also fix a crash when both NEED_PER_CPU_PAGE_FIRST_CHUNK and KASAN_VMALLOC enabled. Tested on ARM64 qemu with cmdline "percpu_alloc=page" based on v5.14-rc2. V2: - fix build error when CONFIG_KASAN disabled, found by lkp@intel.com - drop wrong __weak comment from kasan_populate_early_vm_area_shadow(), found by Marco Elver <elver@google.com> Kefeng Wang (3): vmalloc: Choose a better start address in vm_area_register_early() arm64: Support page mapping percpu first chunk allocator kasan: arm64: Fix pcpu_page_first_chunk crash with KASAN_VMALLOC arch/arm64/Kconfig | 4 ++ arch/arm64/mm/kasan_init.c | 17 ++++++++ drivers/base/arch_numa.c | 82 +++++++++++++++++++++++++++++++++----- include/linux/kasan.h | 6 +++ mm/kasan/init.c | 5 +++ mm/vmalloc.c | 9 +++-- 6 files changed, 110 insertions(+), 13 deletions(-) -- 2.26.2
WARNING: multiple messages have this Message-ID (diff)
From: Kefeng Wang <wangkefeng.wang@huawei.com> To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Andrey Ryabinin <ryabinin.a.a@gmail.com>, Andrey Konovalov <andreyknvl@gmail.com>, Dmitry Vyukov <dvyukov@google.com> Cc: <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <kasan-dev@googlegroups.com>, <linux-mm@kvack.org>, Kefeng Wang <wangkefeng.wang@huawei.com> Subject: [PATCH v2 0/3] arm64: support page mapping percpu first chunk allocator Date: Tue, 20 Jul 2021 10:51:02 +0800 [thread overview] Message-ID: <20210720025105.103680-1-wangkefeng.wang@huawei.com> (raw) Percpu embedded first chunk allocator is the firstly option, but it could fails on ARM64, eg, "percpu: max_distance=0x5fcfdc640000 too large for vmalloc space 0x781fefff0000" "percpu: max_distance=0x600000540000 too large for vmalloc space 0x7dffb7ff0000" "percpu: max_distance=0x5fff9adb0000 too large for vmalloc space 0x5dffb7ff0000" then we could meet "WARNING: CPU: 15 PID: 461 at vmalloc.c:3087 pcpu_get_vm_areas+0x488/0x838", even the system could not boot successfully. Let's implement page mapping percpu first chunk allocator as a fallback to the embedding allocator to increase the robustness of the system. Also fix a crash when both NEED_PER_CPU_PAGE_FIRST_CHUNK and KASAN_VMALLOC enabled. Tested on ARM64 qemu with cmdline "percpu_alloc=page" based on v5.14-rc2. V2: - fix build error when CONFIG_KASAN disabled, found by lkp@intel.com - drop wrong __weak comment from kasan_populate_early_vm_area_shadow(), found by Marco Elver <elver@google.com> Kefeng Wang (3): vmalloc: Choose a better start address in vm_area_register_early() arm64: Support page mapping percpu first chunk allocator kasan: arm64: Fix pcpu_page_first_chunk crash with KASAN_VMALLOC arch/arm64/Kconfig | 4 ++ arch/arm64/mm/kasan_init.c | 17 ++++++++ drivers/base/arch_numa.c | 82 +++++++++++++++++++++++++++++++++----- include/linux/kasan.h | 6 +++ mm/kasan/init.c | 5 +++ mm/vmalloc.c | 9 +++-- 6 files changed, 110 insertions(+), 13 deletions(-) -- 2.26.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-07-20 2:52 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-07-20 2:51 Kefeng Wang [this message] 2021-07-20 2:51 ` [PATCH v2 0/3] arm64: support page mapping percpu first chunk allocator Kefeng Wang 2021-07-20 2:51 ` [PATCH v2 1/3] vmalloc: Choose a better start address in vm_area_register_early() Kefeng Wang 2021-07-20 2:51 ` Kefeng Wang 2021-08-01 15:23 ` Catalin Marinas 2021-08-01 15:23 ` Catalin Marinas 2021-08-02 2:39 ` Kefeng Wang 2021-08-02 2:39 ` Kefeng Wang 2021-08-04 11:14 ` Catalin Marinas 2021-08-04 11:14 ` Catalin Marinas 2021-08-05 12:46 ` Kefeng Wang 2021-08-05 12:46 ` Kefeng Wang 2021-07-20 2:51 ` [PATCH v2 2/3] arm64: Support page mapping percpu first chunk allocator Kefeng Wang 2021-07-20 2:51 ` Kefeng Wang 2021-08-01 15:53 ` Catalin Marinas 2021-08-01 15:53 ` Catalin Marinas 2021-08-02 2:47 ` Kefeng Wang 2021-08-02 2:47 ` Kefeng Wang 2021-07-20 2:51 ` [PATCH v2 3/3] kasan: arm64: Fix pcpu_page_first_chunk crash with KASAN_VMALLOC Kefeng Wang 2021-07-20 2:51 ` Kefeng Wang 2021-07-22 11:00 ` Marco Elver 2021-07-22 11:00 ` Marco Elver 2021-07-22 12:14 ` Kefeng Wang 2021-07-22 12:14 ` Kefeng Wang 2021-07-26 1:19 ` [PATCH v2 0/3] arm64: support page mapping percpu first chunk allocator Kefeng Wang 2021-07-26 1:19 ` Kefeng Wang
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