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([211.54.62.160]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82379b1ee2bsm13920684b3a.3.2026.02.01.04.07.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Feb 2026 04:07:17 -0800 (PST) From: Seongjun Hong To: jan.kiszka@siemens.com, kbingham@kernel.org Cc: linux-kernel@vger.kernel.org, Seongjun Hong Subject: [PATCH] scripts/gdb: support lx-slabinfo on x86 Date: Sun, 1 Feb 2026 21:06:53 +0900 Message-Id: <20260201120653.621524-1-hsj0512@snu.ac.kr> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The lx-slabinfo command failed on x86 because x86_page_ops was not implemented. This patch implements x86_page_ops in mm.py. Additionally, CONFIG_PAGE_SHIFT is required for the calculation but was only available for ARM64 in constants.py.in. This patch moves it to be available for all architectures. Signed-off-by: Seongjun Hong --- scripts/gdb/linux/constants.py.in | 2 +- scripts/gdb/linux/mm.py | 25 ++++++++++++++++++++++++- 2 files changed, 25 insertions(+), 2 deletions(-) diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constant= s.py.in index c3886739a028..11fd4ba6ba85 100644 --- a/scripts/gdb/linux/constants.py.in +++ b/scripts/gdb/linux/constants.py.in @@ -150,8 +150,8 @@ LX_CONFIG(CONFIG_ARM64_64K_PAGES) if IS_BUILTIN(CONFIG_ARM64): LX_VALUE(CONFIG_ARM64_PA_BITS) LX_VALUE(CONFIG_ARM64_VA_BITS) - LX_VALUE(CONFIG_PAGE_SHIFT) LX_VALUE(CONFIG_ARCH_FORCE_MAX_ORDER) +LX_VALUE(CONFIG_PAGE_SHIFT) LX_CONFIG(CONFIG_SPARSEMEM) LX_CONFIG(CONFIG_SPARSEMEM_EXTREME) LX_CONFIG(CONFIG_SPARSEMEM_VMEMMAP) diff --git a/scripts/gdb/linux/mm.py b/scripts/gdb/linux/mm.py index 7571aebbe650..d6e84e4bf102 100644 --- a/scripts/gdb/linux/mm.py +++ b/scripts/gdb/linux/mm.py @@ -26,8 +26,31 @@ class page_ops(): raise gdb.GdbError('Only support CONFIG_SPARSEMEM_VMEMMAP now') if constants.LX_CONFIG_ARM64 and utils.is_target_arch('aarch64'): self.ops =3D aarch64_page_ops() + elif utils.is_target_arch('x86_64') or utils.is_target_arch('x86-6= 4'): + self.ops =3D x86_page_ops() else: - raise gdb.GdbError('Only support aarch64 now') + raise gdb.GdbError('Only support aarch64 and x86_64 now') + +class x86_page_ops(): + def __init__(self): + self.MAX_NUMNODES =3D 1 << constants.LX_CONFIG_NODES_SHIFT + self.struct_page_size =3D utils.get_page_type().sizeof + self.PAGE_SHIFT =3D constants.LX_CONFIG_PAGE_SHIFT + self.PAGE_SIZE =3D 1 << self.PAGE_SHIFT + self.PAGE_OFFSET =3D int(gdb.parse_and_eval("page_offset_base")) + self.VMEMMAP_START =3D int(gdb.parse_and_eval("vmemmap_base")) + + def page_to_virt(self, page): + page_ptr =3D page.cast(utils.get_page_type().pointer()) + vmemmap_ptr =3D gdb.Value(self.VMEMMAP_START).cast(utils.get_page_= type().pointer()) + idx =3D int(page_ptr - vmemmap_ptr) + return self.PAGE_OFFSET + (idx * self.PAGE_SIZE) + + def page_address(self, page): + return self.page_to_virt(page) + + def folio_address(self, folio): + return self.page_address(folio['page'].address) =20 class aarch64_page_ops(): def __init__(self): --=20 2.34.1