Patch "parisc: Increase thread and stack size to 32kb" has been added to the 4.12-stable tree

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 4.12-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-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Helge Deller <[email protected]>
Date: Mon, 31 Jul 2017 08:38:27 +0200
Subject: parisc: Increase thread and stack size to 32kb

From: Helge Deller <[email protected]>

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.

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

@@ -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)

@@ -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 [email protected] are

queue-4.12/parisc-increase-thread-and-stack-size-to-32kb.patch queue-4.12/parisc-handle-vma-s-whose-context-is-not-current-in-flush_cache_range.patch