From: John Hubbard <jhubbard@nvidia.com>
To: Minchan Kim <minchan@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>,
syzbot <syzbot+acf65ca584991f3cc447@syzkaller.appspotmail.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
llvm@lists.linux.dev, nathan@kernel.org, ndesaulniers@google.com,
syzkaller-bugs@googlegroups.com, trix@redhat.com,
Matthew Wilcox <willy@infradead.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
David Hildenbrand <david@redhat.com>
Subject: Re: [syzbot] WARNING in follow_hugetlb_page
Date: Fri, 13 May 2022 17:09:11 -0700 [thread overview]
Message-ID: <4809b134-a37a-50b8-4c25-44548bc1048f@nvidia.com> (raw)
In-Reply-To: <Yn7vnpXwX50J3K+7@google.com>
On 5/13/22 16:54, Minchan Kim wrote:
>>> I isolated this to Minchan Kim's "mm: fix is_pinnable_page against on cma
>>> page". Yes, the fat finger fix is in next-20220513.
>>>
>>> I don't have time to analyze right now, but can confirm that in the
>>> reproducer is_pinnable_page is returning false after this change when it
>>> previously returned true.
>>
>> OK, thanks, I dropped mm-fix-is_pinnable_page-against-on-cma-page.patch
>
> Seems like bug of the patch v5 due to change of this
>
> if (mt & (MIGRATE_CMA | MIGRATE_ISOLATE))
>
> The migration type is not bit type so it shold be
>
> if (mt == MIGRATE_CMA || mt == MIGRATE_ISOLATE)
>
Sorry for leading you astray by recommending the bitwise OR, Minchan.
I overlooked that point even though it was right in front of me.
thanks,
--
John Hubbard
NVIDIA
next prev parent reply other threads:[~2022-05-14 2:52 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-13 9:03 [syzbot] WARNING in follow_hugetlb_page syzbot
2022-05-13 16:43 ` syzbot
2022-05-13 17:26 ` Andrew Morton
2022-05-13 18:09 ` Mike Kravetz
2022-05-13 22:48 ` Mike Kravetz
2022-05-13 23:19 ` Andrew Morton
2022-05-13 23:54 ` Minchan Kim
2022-05-14 0:09 ` John Hubbard [this message]
2022-05-14 0:26 ` Minchan Kim
2022-05-14 0:56 ` John Hubbard
2022-05-14 1:16 ` John Hubbard
2022-05-17 3:37 ` Mike Kravetz
2022-05-18 7:12 ` John Hubbard
2022-05-20 22:19 ` Minchan Kim
2022-05-20 22:56 ` John Hubbard
2022-05-20 23:25 ` Minchan Kim
2022-05-20 23:31 ` Mike Kravetz
2022-05-20 23:43 ` Minchan Kim
2022-05-21 0:04 ` Mike Kravetz
2022-05-21 15:24 ` Minchan Kim
2022-05-21 15:51 ` David Hildenbrand
2022-05-21 16:36 ` Minchan Kim
2022-05-21 16:46 ` David Hildenbrand
2022-05-21 18:25 ` Minchan Kim
2022-05-21 23:50 ` Mike Kravetz
2022-05-14 0:18 ` Andrew Morton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4809b134-a37a-50b8-4c25-44548bc1048f@nvidia.com \
--to=jhubbard@nvidia.com \
--cc=akpm@linux-foundation.org \
--cc=david@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=llvm@lists.linux.dev \
--cc=mike.kravetz@oracle.com \
--cc=minchan@kernel.org \
--cc=nathan@kernel.org \
--cc=ndesaulniers@google.com \
--cc=sfr@canb.auug.org.au \
--cc=syzbot+acf65ca584991f3cc447@syzkaller.appspotmail.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=trix@redhat.com \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).