Patch "parisc: Increase thread and stack size to 32kb" has been added to the 4.4-stable tree

Patch "parisc: Increase thread and stack size to 32kb" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    parisc: Increase thread and stack size to 32kb

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     parisc-increase-thread-and-stack-size-to-32kb.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 8f8201dfed91a43ac38c899c82f81eef3d36afd9 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Mon, 31 Jul 2017 08:38:27 +0200
Subject: parisc: Increase thread and stack size to 32kb

From: Helge Deller <deller@gmx.de>

commit 8f8201dfed91a43ac38c899c82f81eef3d36afd9 upstream.

Since kernel 4.11 the thread and irq stacks on parisc randomly overflow
the default size of 16k. The reason why stack usage suddenly grew is yet
unknown.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/parisc/include/asm/thread_info.h |    2 +-
 arch/parisc/kernel/irq.c              |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/arch/parisc/include/asm/thread_info.h
+++ b/arch/parisc/include/asm/thread_info.h
@@ -34,7 +34,7 @@ struct thread_info {
 
 /* thread information allocation */
 
-#define THREAD_SIZE_ORDER	2 /* PA-RISC requires at least 16k stack */
+#define THREAD_SIZE_ORDER	3 /* PA-RISC requires at least 32k stack */
 /* Be sure to hunt all references to this down when you change the size of
  * the kernel stack */
 #define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -380,7 +380,7 @@ static inline int eirr_to_irq(unsigned l
 /*
  * IRQ STACK - used for irq handler
  */
-#define IRQ_STACK_SIZE      (4096 << 2) /* 16k irq stack size */
+#define IRQ_STACK_SIZE      (4096 << 3) /* 32k irq stack size */
 
 union irq_stack_union {
 	unsigned long stack[IRQ_STACK_SIZE/sizeof(unsigned long)];


Patches currently in stable-queue which might be from deller@gmx.de are

queue-4.4/parisc-increase-thread-and-stack-size-to-32kb.patch