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McKenney" , Boqun Feng , Marco Elver , Peter Zijlstra , Tomas Gleixner , Vlastimil Babka , akpm@linux-foundation.org, cl@linux.com, iamjoonsoo.kim@lge.com, longman@redhat.com, penberg@kernel.org, rientjes@google.com, sfr@canb.auug.org.au Subject: [PATCH v3 0/4] scftorture: Avoid kfree from IRQ context. Date: Fri, 8 Nov 2024 11:39:30 +0100 Message-ID: <20241108104217.3759904-1-bigeasy@linutronix.de> MIME-Version: 1.0 X-Stat-Signature: 1eecsfhuf1k48b15pfyudg7ph9k4zkkc X-Rspamd-Queue-Id: 7C45C8000B X-Rspamd-Server: rspam08 X-Rspam-User: X-HE-Tag: 1731062475-467116 X-HE-Meta: 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 Wk1ZGKFO j9o0WraF9FxaKpT44zALF0vBlhLp3rmS/nllmrF6vq8ooUQF93kHUxLocbxYWOSqJkMn77wjxqamX4u4u4rQxDWkHJcvMh1VTXjKP+W/tNsaT9h/XiX0s1UFIsLieToI5DjSAIrrJ2eynB/n6ikg1QPxdcLOS6UcdMtHroHco8z4g+7XS5rEG6s2GqBPfK7J2bsVOV/mdw2qPatmjIrXQXNi4STWN2g6MAcuq X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi, Paul reported kfree from IRQ context in scftorture which is noticed by lockdep since the recent PROVE_RAW_LOCK_NESTING switch. The last patch in this series adresses the issues, the other things happened on the way. v2…v3: - The clean up on module exit must not be done with thread numbers. Reported by Boqun Feng. - Move the clean up on module exit prior to torture_cleanup_end(). Reported by Paul. v1…v2: - Remove kfree_bulk(). I get more invocations per report without it. - Pass `cpu' to scf_cleanup_free_list in scftorture_invoker() instead of scfp->cpu. The latter is the thread number which can be larger than the number CPUs leading to a crash in such a case. Reported by Boqun Feng. - Clean up the per-CPU lists on module exit. Reported by Boqun Feng. Sebastian