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tools/workqueue/wq_dump.py: Support backward compatibility for wq->attrs rename

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Commit 464e454e1c ("workqueue: rename wq->unbound_attrs to wq->attrs")
renamed wq->unbound_attrs to wq->attrs. When running wq_dump.py against
older running kernels or vmcores where struct workqueue_struct still
contains unbound_attrs, drgn raises an AttributeError.

Add a wq_attrs() helper to allow wq_dump.py to inspect both older and newer
kernel versions seamlessly.

Fixes: 464e454e1c ("workqueue: rename wq->unbound_attrs to wq->attrs")
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Aaron Tomlin 2026-08-31 14:15:53 -04:00 committed by Tejun Heo
parent 068c35b5d0
commit 93e257938a
1 changed files with 8 additions and 2 deletions
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10
tools/workqueue/wq_dump.py
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@ -78,6 +78,12 @@ def cpumask_str(cpumask):
wq_type_len = 9
def wq_attrs(wq):
try:
return wq.attrs
except AttributeError:
return wq.unbound_attrs
def wq_type_str(wq):
if wq.flags & WQ_BH:
return f'{"bh":{wq_type_len}}'
@ -85,7 +91,7 @@ def wq_type_str(wq):
if wq.flags & WQ_ORDERED:
return f'{"ordered":{wq_type_len}}'
else:
if wq.attrs.affn_strict:
if wq_attrs(wq).affn_strict:
return f'{"unbound,S":{wq_type_len}}'
else:
return f'{"unbound":{wq_type_len}}'
@ -206,7 +212,7 @@ for wq in list_for_each_entry('struct workqueue_struct', workqueues.address_of_(
print(f'{wq.name.string_().decode():{WQ_NAME_LEN}}', end='')
if wq.flags & WQ_UNBOUND:
print(f' {cpumask_str(wq.attrs.cpumask):{ucpus_len}}', end='')
print(f' {cpumask_str(wq_attrs(wq).cpumask):{ucpus_len}}', end='')
else:
print(f' {"":{ucpus_len}}', end='')