The patch titled Subject: scripts/gdb/vmalloc: add vmallocinfo support has been added to the -mm mm-nonmm-unstable branch. Its filename is scripts-gdb-vmalloc-add-vmallocinfo-support.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/scripts-gdb-vmalloc-add-vmallocinfo-support.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx> Subject: scripts/gdb/vmalloc: add vmallocinfo support Date: Tue, 25 Jul 2023 17:34:58 +0800 This GDB script shows the vmallocinfo for user to analyze the vmalloc memory usage. Example output: 0xffff800008000000-0xffff800008009000 36864 <start_kernel+372> pages=8 vmalloc 0xffff800008009000-0xffff80000800b000 8192 <gicv2m_init_one+400> phys=0x8020000 ioremap 0xffff80000800b000-0xffff80000800d000 8192 <bpf_prog_alloc_no_stats+72> pages=1 vmalloc 0xffff80000800d000-0xffff80000800f000 8192 <bpf_jit_alloc_exec+16> pages=1 vmalloc 0xffff800008010000-0xffff80000ad30000 47316992 <paging_init+452> phys=0x40210000 vmap 0xffff80000ad30000-0xffff80000c1c0000 21561344 <paging_init+556> phys=0x42f30000 vmap 0xffff80000c1c0000-0xffff80000c370000 1769472 <paging_init+592> phys=0x443c0000 vmap 0xffff80000c370000-0xffff80000de90000 28442624 <paging_init+692> phys=0x44570000 vmap 0xffff80000de90000-0xffff80000f4c1000 23269376 <paging_init+788> phys=0x46090000 vmap 0xffff80000f4c1000-0xffff80000f4c3000 8192 <gen_pool_add_owner+112> pages=1 vmalloc 0xffff80000f4c3000-0xffff80000f4c5000 8192 <gen_pool_add_owner+112> pages=1 vmalloc 0xffff80000f4c5000-0xffff80000f4c7000 8192 <gen_pool_add_owner+112> pages=1 vmalloc Link: https://lkml.kernel.org/r/20230725093458.30064-9-Kuan-Ying.Lee@xxxxxxxxxxxx Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx> Cc: Chinwen Chang <chinwen.chang@xxxxxxxxxxxx> Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx> Cc: Qun-Wei Lin <qun-wei.lin@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- scripts/gdb/linux/constants.py.in | 8 ++++ scripts/gdb/linux/vmalloc.py | 56 ++++++++++++++++++++++++++++ scripts/gdb/vmlinux-gdb.py | 1 3 files changed, 65 insertions(+) --- a/scripts/gdb/linux/constants.py.in~scripts-gdb-vmalloc-add-vmallocinfo-support +++ a/scripts/gdb/linux/constants.py.in @@ -22,6 +22,7 @@ #include <linux/radix-tree.h> #include <linux/slab.h> #include <linux/threads.h> +#include <linux/vmalloc.h> #include <asm/memory.h> /* We need to stringify expanded macros so that they can be parsed */ @@ -96,6 +97,13 @@ if IS_BUILTIN(CONFIG_ARM64): LX_GDBPARSED(VA_BITS_MIN) LX_GDBPARSED(MODULES_VSIZE) +/* linux/vmalloc.h */ +LX_VALUE(VM_IOREMAP) +LX_VALUE(VM_ALLOC) +LX_VALUE(VM_MAP) +LX_VALUE(VM_USERMAP) +LX_VALUE(VM_DMA_COHERENT) + /* linux/page_ext.h */ LX_GDBPARSED(PAGE_EXT_OWNER) LX_GDBPARSED(PAGE_EXT_OWNER_ALLOCATED) --- /dev/null +++ a/scripts/gdb/linux/vmalloc.py @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2023 MediaTek Inc. +# +# Authors: +# Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx> +# + +import gdb +import re +from linux import lists, utils, stackdepot, constants, mm + +vmap_area_type = utils.CachedType('struct vmap_area') +vmap_area_ptr_type = vmap_area_type.get_type().pointer() + +def is_vmalloc_addr(x): + pg_ops = mm.page_ops().ops + addr = pg_ops.kasan_reset_tag(x) + return addr >= pg_ops.VMALLOC_START and addr < pg_ops.VMALLOC_END + +class LxVmallocInfo(gdb.Command): + """Show vmallocinfo""" + + def __init__(self): + super(LxVmallocInfo, self).__init__("lx-vmallocinfo", gdb.COMMAND_DATA) + + def invoke(self, arg, from_tty): + vmap_area_list = gdb.parse_and_eval('vmap_area_list') + for vmap_area in lists.list_for_each_entry(vmap_area_list, vmap_area_ptr_type, "list"): + if not vmap_area['vm']: + gdb.write("0x%x-0x%x %10d vm_map_ram\n" % (vmap_area['va_start'], vmap_area['va_end'], + vmap_area['va_end'] - vmap_area['va_start'])) + continue + v = vmap_area['vm'] + gdb.write("0x%x-0x%x %10d" % (v['addr'], v['addr'] + v['size'], v['size'])) + if v['caller']: + gdb.write(" %s" % str(v['caller']).split(' ')[-1]) + if v['nr_pages']: + gdb.write(" pages=%d" % v['nr_pages']) + if v['phys_addr']: + gdb.write(" phys=0x%x" % v['phys_addr']) + if v['flags'] & constants.LX_VM_IOREMAP: + gdb.write(" ioremap") + if v['flags'] & constants.LX_VM_ALLOC: + gdb.write(" vmalloc") + if v['flags'] & constants.LX_VM_MAP: + gdb.write(" vmap") + if v['flags'] & constants.LX_VM_USERMAP: + gdb.write(" user") + if v['flags'] & constants.LX_VM_DMA_COHERENT: + gdb.write(" dma-coherent") + if is_vmalloc_addr(v['pages']): + gdb.write(" vpages") + gdb.write("\n") + +LxVmallocInfo() --- a/scripts/gdb/vmlinux-gdb.py~scripts-gdb-vmalloc-add-vmallocinfo-support +++ a/scripts/gdb/vmlinux-gdb.py @@ -48,3 +48,4 @@ else: import linux.stackdepot import linux.page_owner import linux.slab + import linux.vmalloc _ Patches currently in -mm which might be from Kuan-Ying.Lee@xxxxxxxxxxxx are scripts-gdb-symbols-add-specific-ko-module-load-command.patch scripts-gdb-modules-add-get-module-text-support.patch scripts-gdb-utils-add-common-type-usage.patch scripts-gdb-aarch64-add-aarch64-page-operation-helper-commands-and-configs.patch scripts-gdb-stackdepot-add-stackdepot-support.patch scripts-gdb-page_owner-add-page-owner-support.patch scripts-gdb-slab-add-slab-support.patch scripts-gdb-vmalloc-add-vmallocinfo-support.patch