forked from mirrors/linux
0040f2c553
The patch series "Mitigate a vmap lock contention" removes vmap_area_list, which will break the gdb vmallocinfo command: (gdb) lx-vmallocinfo Python Exception <class 'gdb.error'>: No symbol "vmap_area_list" in current context. Error occurred in Python: No symbol "vmap_area_list" in current context. So we can instead use vmap_nodes to iterate all vmallocinfo. Link: https://lkml.kernel.org/r/20240207085856.11190-1-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Casper Li <casper.li@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
62 lines
2.3 KiB
Python
62 lines
2.3 KiB
Python
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# Copyright (c) 2023 MediaTek Inc.
|
|
#
|
|
# Authors:
|
|
# Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
|
|
#
|
|
|
|
import gdb
|
|
import re
|
|
from linux import lists, utils, stackdepot, constants, mm
|
|
|
|
if constants.LX_CONFIG_MMU:
|
|
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):
|
|
if not constants.LX_CONFIG_MMU:
|
|
raise gdb.GdbError("Requires MMU support")
|
|
|
|
nr_vmap_nodes = gdb.parse_and_eval('nr_vmap_nodes')
|
|
for i in range(0, nr_vmap_nodes):
|
|
vn = gdb.parse_and_eval('&vmap_nodes[%d]' % i)
|
|
for vmap_area in lists.list_for_each_entry(vn['busy']['head'], 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()
|