linux-kernel - [PATCH 0/2] Fix page

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Message-ID: <20210317142050.57712-1-chenjun102@huawei.com>
Date:   Wed, 17 Mar 2021 14:20:48 +0000
From:   Chen Jun <chenjun102@...wei.com>
To:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <akpm@...ux-foundation.org>, <catalin.marinas@....com>,
        <will@...nel.org>, <rui.xiang@...wei.com>
Subject: [PATCH 0/2] Fix page_owner broken on arm64

On arm64, cat /sys/kernel/debug/page_owner
All pages return the same stack
 stack_trace_save+0x4c/0x78
 register_early_stack+0x34/0x70
 init_page_owner+0x34/0x230
 page_ext_init+0x1bc/0x1dc

The reason is arch_stack_walk save 2 more entries than before.

To fix it, add skip in arch_stack_walk

*** BLURB HERE ***

1. Prepare for 2, move stacktrace_cookie to .h
2. Fix the problem

Chen Jun (2):
  stacktrace: Move struct stacktrace_cookie to stacktrace.h
  arm64: stacktrace: Add skip when task == current

 arch/arm64/kernel/stacktrace.c | 5 +++--
 include/linux/stacktrace.h     | 7 +++++++
 kernel/stacktrace.c            | 7 -------
 3 files changed, 10 insertions(+), 9 deletions(-)

-- 
2.9.4