From: Helge Deller <deller@kernel.org>
To: linux-parisc@vger.kernel.org
Subject: [PATCH v2] parisc: Increase kernel stack size to 32kb
Date: Mon, 21 Sep 2026 22:21:10 +0200 [thread overview]
Message-ID: <20260921202122.3102-1-deller@kernel.org> (raw)
From: Helge Deller <deller@gmx.de>
For 64-bit Linux kernels, increase the default kernel stack size
(THREAD_SIZE_ORDER) to 32 kB, in order to avoid kernel crashes which have been
triggered recently when building the debian vtk9 package with gcc 17:
stackcheck: kworker/u128:0 will most likely overflow kernel stack (sp:179a83af0, stk bottom-top:179a80000-179a84000)
Kernel panic - not syncing: low stack detected by irq handler - check messages
CPU: 2 UID: 0 PID: 30760 Comm: kworker/u128:0 Tainted: G W 6.18.46-dirty #1 NONE
Tainted: [W]=WARN
Hardware name: 9000/800/rp3440
Workqueue: writeback wb_workfn (flush-259:0)
Backtrace:
[<000000004022f050>] show_stack+0x70/0x90
[<000000004022378c>] dump_stack_lvl+0x124/0x190
[<000000004022382c>] dump_stack+0x34/0x48
[<000000004020212c>] vpanic+0x204/0x648
[<00000000402025c4>] panic+0x54/0x58
[<0000000040232230>] do_cpu_irq_mask+0x3f8/0x440
[<0000000040227070>] intr_return+0x0/0xc
Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org # v6.18+
---
arch/parisc/include/asm/thread_info.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
index b283738bb6da..249370706242 100644
--- a/arch/parisc/include/asm/thread_info.h
+++ b/arch/parisc/include/asm/thread_info.h
@@ -24,7 +24,7 @@ struct thread_info {
/* thread information allocation */
-#ifdef CONFIG_IRQSTACKS
+#if defined(CONFIG_IRQSTACKS) && !defined(CONFIG_64BIT)
#define THREAD_SIZE_ORDER 2 /* PA-RISC requires at least 16k stack */
#else
#define THREAD_SIZE_ORDER 3 /* PA-RISC requires at least 32k stack */
--
2.54.0
reply other threads:[~2026-09-21 20:21 UTC|newest]
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