linux-kernel - [PATCH 0/3] mm, printk: dump full information of page flags in pGp

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Date:   Thu, 28 Jan 2021 10:19:44 +0800
From:   Yafang Shao <laoar.shao@...il.com>
To:     david@...hat.com, vbabka@...e.cz, cl@...ux.com, penberg@...nel.org,
        rientjes@...gle.com, iamjoonsoo.kim@....com,
        akpm@...ux-foundation.org, pmladek@...e.com, rostedt@...dmis.org,
        sergey.senozhatsky@...il.com, andriy.shevchenko@...ux.intel.com,
        linux@...musvillemoes.dk
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Yafang Shao <laoar.shao@...il.com>
Subject: [PATCH 0/3] mm, printk: dump full information of page flags in pGp 

Currently the pGp only shows the names of page flags, rather than
the full information including section, node, zone, last cpupid and
kasan tag. While it is not easy to parse these information manually
because there're so many flavors. Let's interpret them in pGp as well.

This patchset also includes some code cleanup in mm/slub.c.

Below is the example of the output in mm/slub.c.
- Before the patchset
[ 6155.716018] INFO: Slab 0x000000004027dd4f objects=33 used=3 fp=0x000000008cd1579c flags=0x17ffffc0010200

- After the patchset
[ 6315.235783] ERR: Slab 0x000000006d1133b9 objects=33 used=3 fp=0x000000006d0779d1 flags=0x17ffffc0010200(Node 0x0,Zone 0x2,Lastcpupid 0x1fffff,slab|head)

Yafang Shao (3):
  mm, slub: use pGp to print page flags
  mm, slub: don't combine pr_err with INFO
  printk: dump full information of page flags in pGp

 lib/vsprintf.c | 42 +++++++++++++++++++++++++++++++++++++++++-
 mm/slub.c      | 13 +++++++------
 2 files changed, 48 insertions(+), 7 deletions(-)

-- 
2.17.1