Re: [PATCH v2 3/3] vsprintf: dump full information of page flags in pGp

[Matthew Wilcox]

On Mon, Feb 01, 2021 at 07:56:10PM +0800, Yafang Shao wrote:
> - Before the patch,
> [ 6343.396602] Slab 0x000000004382e02b objects=33 used=3 fp=0x000000009ae06ffc flags=0x17ffffc0010200(slab|head)
> 
> - After the patch,
> [ 6871.296131] Slab 0x00000000c0e19a37 objects=33 used=3 fp=0x00000000c4902159 flags=0x17ffffc0010200(Node 0,Zone 2,Lastcpupid 0x1fffff,slab|head)

I would suggest it will be easier to parse as:

flags=0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)

That should alleviate the concerns about debugfs format change -- we've
never guaranteed that flag names won't change, and they now look enough
like flags that parsers shouldn't fall over them.