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Mon, 14 Sep 2026 10:32:24 +0000 (GMT) From: Maninder Singh To: linux@armlinux.org.uk, linusw@kernel.org, mark.rutland@arm.com, kmehltretter@gmail.com, vbabka@suse.cz, elver@google.com, akpm@linux-foundation.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, r.thapliyal@samsung.com, Maninder Singh , Hariom Panthi Subject: [PATCH 1/1] lib/stackdepot: add __irq_svc to irq text section to filter it from traces Date: Mon, 14 Sep 2026 16:02:18 +0530 Message-Id: <20260914103218.1125401-1-maninder1.s@samsung.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CMS-MailID: 20260914103226epcas5p4832171ae7e2b5e19ab4eaaf66a6e6768 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P X-CMS-RootMailID: 20260914103226epcas5p4832171ae7e2b5e19ab4eaaf66a6e6768 References: Stackdepot usage is growing exponentially because current irq filter is not removing trace after __irq_svc frame, so adding __irq_svc in irq text section. stacktrace 1 stacktrace 2 kmem_cache_free+0x148/0x398 kmem_cache_free+0x148/0x398 mt_free_rcu+0x20/0x24 mt_free_rcu+0x20/0x24 rcu_core+0x338/0x9fc rcu_core+0x338/0x9fc rcu_core_si+0x18/0x1c rcu_core_si+0x18/0x1c handle_softirqs+0x194/0x47c handle_softirqs+0x194/0x47c irq_exit+0xb0/0xdc irq_exit+0xb0/0xdc generic_handle_arch_irq+0x48/0x4c generic_handle_arch_irq+0x48/0x4c call_with_stack+0x1c/0x20 call_with_stack+0x1c/0x20 __irq_svc+0x128/0x154 __irq_svc+0x128/0x154 _raw_spin_unlock_irq+0x30/0x64 stack_trace_consume_entry+0x58/0x74 __vma_link_file+0x4c/0x70 arch_stack_walk+0x88/0x120 vma_link_file+0x40/0x4c stack_trace_save+0x48/0x54 __mmap_region+0x660/0x99c save_stack+0x5c/0x14c mmap_region+0x6c/0x108 __set_page_owner+0x38/0x254 do_mmap+0x3c4/0x4d8 get_page_from_freelist+0x1714/0x1938 vm_mmap_pgoff+0xd0/0x16c __alloc_pages_noprof+0x120/0x1204 Co-developed-by: Hariom Panthi Signed-off-by: Hariom Panthi Signed-off-by: Maninder Singh --- arch/arm/kernel/entry-armv.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 2d2ea3ca880c..38696256d997 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -223,6 +223,7 @@ __dabt_svc: ENDPROC(__dabt_svc) .align 5 +.pushsection .irqentry.text, "ax" __irq_svc: svc_entry irq_handler from_user=0 @@ -239,6 +240,7 @@ __irq_svc: svc_exit r5, irq = 1 @ return from exception UNWIND(.fnend ) ENDPROC(__irq_svc) +.popsection .ltorg -- 2.34.1