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scripts/gdb/vmalloc: fix vmallocinfo error

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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>
This commit is contained in:
Kuan-Ying Lee 2024-02-07 16:58:51 +08:00 committed by Andrew Morton
parent 3956570ef7
commit 0040f2c553
1 changed files with 29 additions and 27 deletions
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6
scripts/gdb/linux/vmalloc.py
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@ -29,8 +29,10 @@ class LxVmallocInfo(gdb.Command):
if not constants.LX_CONFIG_MMU:
raise gdb.GdbError("Requires MMU support")
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"):
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']))