Re: Test case for "mm/thp: carry over dirty bit when thp splits on pmd"

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To: David Hildenbrand <david@xxxxxxxxxx>
Subject: Re: Test case for "mm/thp: carry over dirty bit when thp splits on pmd"
From: hev <r@xxxxxx>
Date: Fri, 25 Nov 2022 19:15:54 +0800
Cc: Peter Xu <peterx@xxxxxxxxxx>, Anatoly Pugachev <matorola@xxxxxxxxx>, Thorsten Leemhuis <regressions@xxxxxxxxxxxxx>, Sparc kernel list <sparclinux@xxxxxxxxxxxxxxx>, linux-mm <linux-mm@xxxxxxxxx>
In-reply-to: <79cf9e73-440c-5ff0-856f-3df6c13061ef@redhat.com>
References: <CAHirt9gr7oL87co3y1hCs3Ux4utzFP5oj6GFOFMZuJR2Vv8+rA@mail.gmail.com> <CADxRZqxqb7f_WhMh=jweZP+ynf_JwGd-0VwbYgp4P+T0-AXosw@mail.gmail.com> <Y3UPAKqVp6WAmRHV@x1n> <CAHirt9i03CFCK-4XNZb8dUxHrQqKx8c0_3=S2Y3oNvUex3xCBw@mail.gmail.com> <Y3Z9Zf0jARMOkFBq@x1n> <CAHirt9i8iLCP3_ppEL5kO2XLVAg0sno0GdzdKyzk7DSMTJF0tA@mail.gmail.com> <79cf9e73-440c-5ff0-856f-3df6c13061ef@redhat.com>

Hi, David,

>
> Just to ask again,
>
> is code like
>         maybe_mkwrite(pte_mkdirty(entry), vma);
>
> Like we have in copy_present_page(), wp_page_reuse(), wp_page_copy() ...
> broken on LoongArch of the VMA lacks VM_WRITE?

Sorry for the late reply. In this test case, The VMA doesn't lack VM_WRITE.

Regards,
Ray

Follow-Ups:
- Re: Test case for "mm/thp: carry over dirty bit when thp splits on pmd"
  - From: David Hildenbrand

References:
- Re: Test case for "mm/thp: carry over dirty bit when thp splits on pmd"
  - From: Anatoly Pugachev
- Re: Test case for "mm/thp: carry over dirty bit when thp splits on pmd"
  - From: Peter Xu
- Re: Test case for "mm/thp: carry over dirty bit when thp splits on pmd"
  - From: hev
- Re: Test case for "mm/thp: carry over dirty bit when thp splits on pmd"
  - From: Peter Xu
- Re: Test case for "mm/thp: carry over dirty bit when thp splits on pmd"
  - From: hev
- Re: Test case for "mm/thp: carry over dirty bit when thp splits on pmd"
  - From: David Hildenbrand

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