forked from mirrors/linux
852622bf36
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/20230808083020.22254-9-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
56 lines
2 KiB
Python
56 lines
2 KiB
Python
# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (c) 2023 MediaTek Inc.
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#
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# Authors:
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# Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
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#
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import gdb
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import re
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from linux import lists, utils, stackdepot, constants, mm
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vmap_area_type = utils.CachedType('struct vmap_area')
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vmap_area_ptr_type = vmap_area_type.get_type().pointer()
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def is_vmalloc_addr(x):
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pg_ops = mm.page_ops().ops
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addr = pg_ops.kasan_reset_tag(x)
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return addr >= pg_ops.VMALLOC_START and addr < pg_ops.VMALLOC_END
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class LxVmallocInfo(gdb.Command):
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"""Show vmallocinfo"""
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def __init__(self):
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super(LxVmallocInfo, self).__init__("lx-vmallocinfo", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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vmap_area_list = gdb.parse_and_eval('vmap_area_list')
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for vmap_area in lists.list_for_each_entry(vmap_area_list, vmap_area_ptr_type, "list"):
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if not vmap_area['vm']:
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gdb.write("0x%x-0x%x %10d vm_map_ram\n" % (vmap_area['va_start'], vmap_area['va_end'],
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vmap_area['va_end'] - vmap_area['va_start']))
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continue
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v = vmap_area['vm']
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gdb.write("0x%x-0x%x %10d" % (v['addr'], v['addr'] + v['size'], v['size']))
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if v['caller']:
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gdb.write(" %s" % str(v['caller']).split(' ')[-1])
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if v['nr_pages']:
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gdb.write(" pages=%d" % v['nr_pages'])
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if v['phys_addr']:
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gdb.write(" phys=0x%x" % v['phys_addr'])
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if v['flags'] & constants.LX_VM_IOREMAP:
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gdb.write(" ioremap")
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if v['flags'] & constants.LX_VM_ALLOC:
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gdb.write(" vmalloc")
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if v['flags'] & constants.LX_VM_MAP:
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gdb.write(" vmap")
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if v['flags'] & constants.LX_VM_USERMAP:
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gdb.write(" user")
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if v['flags'] & constants.LX_VM_DMA_COHERENT:
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gdb.write(" dma-coherent")
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if is_vmalloc_addr(v['pages']):
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gdb.write(" vpages")
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gdb.write("\n")
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LxVmallocInfo()
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