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scripts/gdb: remove exception handling and refine print format

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1. When we crash on a page, we want to check what happened on this
   page instead of skipping this page by try-except block.  Thus, removing
   the try-except block.

2. Remove redundant comma and print the task name properly.

Link: https://lkml.kernel.org/r/20231127070404.4192-4-Kuan-Ying.Lee@mediatek.com
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kuan-Ying Lee 2023-11-27 15:04:03 +08:00 committed by Andrew Morton
parent 125e9987a2
commit e52ec6a2db
2 changed files with 26 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
scripts/gdb/linux/page_owner.py
View File

@ -122,27 +122,24 @@ class DumpPageOwner(gdb.Command):
if not (page_ext['flags'] & (1 << PAGE_EXT_OWNER_ALLOCATED)):
gdb.write("page_owner is not allocated\n")
try:
page_owner = self.get_page_owner(page_ext)
gdb.write("Page last allocated via order %d, gfp_mask: 0x%x, pid: %d, tgid: %d (%s), ts %u ns, free_ts %u ns\n" %\
(page_owner["order"], page_owner["gfp_mask"],\
page_owner["pid"], page_owner["tgid"], page_owner["comm"],\
page_owner["ts_nsec"], page_owner["free_ts_nsec"]))
gdb.write("PFN: %d, Flags: 0x%x\n" % (pfn, page['flags']))
if page_owner["handle"] == 0:
gdb.write('page_owner allocation stack trace missing\n')
else:
stackdepot.stack_depot_print(page_owner["handle"])
page_owner = self.get_page_owner(page_ext)
gdb.write("Page last allocated via order %d, gfp_mask: 0x%x, pid: %d, tgid: %d (%s), ts %u ns, free_ts %u ns\n" %\
(page_owner["order"], page_owner["gfp_mask"],\
page_owner["pid"], page_owner["tgid"], page_owner["comm"].string(),\
page_owner["ts_nsec"], page_owner["free_ts_nsec"]))
gdb.write("PFN: %d, Flags: 0x%x\n" % (pfn, page['flags']))
if page_owner["handle"] == 0:
gdb.write('page_owner allocation stack trace missing\n')
else:
stackdepot.stack_depot_print(page_owner["handle"])
if page_owner["free_handle"] == 0:
gdb.write('page_owner free stack trace missing\n')
else:
gdb.write('page last free stack trace:\n')
stackdepot.stack_depot_print(page_owner["free_handle"])
if page_owner['last_migrate_reason'] != -1:
gdb.write('page has been migrated, last migrate reason: %s\n' % self.migrate_reason_names[page_owner['last_migrate_reason']])
except:
gdb.write("\n")
if page_owner["free_handle"] == 0:
gdb.write('page_owner free stack trace missing\n')
else:
gdb.write('page last free stack trace:\n')
stackdepot.stack_depot_print(page_owner["free_handle"])
if page_owner['last_migrate_reason'] != -1:
gdb.write('page has been migrated, last migrate reason: %s\n' % self.migrate_reason_names[page_owner['last_migrate_reason']])
def read_page_owner(self):
pfn = self.min_pfn
@ -173,18 +170,13 @@ class DumpPageOwner(gdb.Command):
pfn += 1
continue
try:
page_owner = self.get_page_owner(page_ext)
gdb.write("Page allocated via order %d, gfp_mask: 0x%x, pid: %d, tgid: %d (%s), ts %u ns, free_ts %u ns\n" %\
(page_owner["order"], page_owner["gfp_mask"],\
page_owner["pid"], page_owner["tgid"], page_owner["comm"],\
page_owner["ts_nsec"], page_owner["free_ts_nsec"]))
gdb.write("PFN: %d, Flags: 0x%x\n" % (pfn, page['flags']))
stackdepot.stack_depot_print(page_owner["handle"])
pfn += (1 << page_owner["order"])
continue
except:
gdb.write("\n")
pfn += 1
page_owner = self.get_page_owner(page_ext)
gdb.write("Page allocated via order %d, gfp_mask: 0x%x, pid: %d, tgid: %d (%s), ts %u ns, free_ts %u ns\n" %\
(page_owner["order"], page_owner["gfp_mask"],\
page_owner["pid"], page_owner["tgid"], page_owner["comm"].string(),\
page_owner["ts_nsec"], page_owner["free_ts_nsec"]))
gdb.write("PFN: %d, Flags: 0x%x\n" % (pfn, page['flags']))
stackdepot.stack_depot_print(page_owner["handle"])
pfn += (1 << page_owner["order"])
DumpPageOwner()

3
scripts/gdb/linux/slab.py
View File

@ -228,8 +228,7 @@ def slabtrace(alloc, cache_name):
nr_cpu = gdb.parse_and_eval('__num_online_cpus')['counter']
if nr_cpu > 1:
gdb.write(" cpus=")
for i in loc['cpus']:
gdb.write("%d," % i)
gdb.write(','.join(str(cpu) for cpu in loc['cpus']))
gdb.write("\n")
if constants.LX_CONFIG_STACKDEPOT:
if loc['handle']: