Re: [PATCH v8 2/4] uprobe: use original page when all uprobes are removed

From: Song Liu
Date: Wed Jul 24 2019 - 05:21:08 EST

> On Jul 24, 2019, at 2:17 AM, Oleg Nesterov <oleg@xxxxxxxxxx> wrote:
> On 07/24, Oleg Nesterov wrote:
>> On 07/24, Song Liu wrote:
>>> This patch allows uprobe to use original page when possible (all uprobes
>>> on the page are already removed).
>> and only if the original page is already in the page cache and uptodate,
>> right?
>> another reason why I think unmap makes more sense... but I won't argue.
> but somehow I forgot we need to read the original page anyway to check
> pages_identical(), so unmap is not really better, please forget.

Yeah, I was trying to explain this. :)

Thanks for your feedbacks.