From: Linus Torvalds <torvalds@linux-foundation.org>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Michal Hocko <mhocko@kernel.org>, linux-mm <linux-mm@kvack.org>,
"the arch/x86 maintainers" <x86@kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [mm 4.15-rc7] Random oopses under memory pressure.
Date: Thu, 11 Jan 2018 17:42:03 -0800 [thread overview]
Message-ID: <CA+55aFx4pH4odYDfuGemm5TK-CS4E8pL_ipHCVzVBmsQkyWp1Q@mail.gmail.com> (raw)
In-Reply-To: <201801120131.w0C1VJUN034283@www262.sakura.ne.jp>
On Thu, Jan 11, 2018 at 5:31 PM, Tetsuo Handa
<penguin-kernel@i-love.sakura.ne.jp> wrote:
>
> Thus, I suspect that somewhere is confusing HighMem pages and !HighMem pages.
Hmm. I can't even imagine how you'd do that.
Sure, if you take page_address() to get a kmap'ed linear address, and
then feed that linear address back to virt_to_page(), you'd certainly
get a crazy page. But that would be insane.. I don't see how you'd do
that.
Hmm. Do you have CONFIG_DEBUG_VIRTUAL enabled? That should catch at
least the above case, it should enable a debugging version of
__virt_to_phys() and use it.
Linus
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next prev parent reply other threads:[~2018-01-12 1:42 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <201801091939.JDJ64598.HOMFQtOFSOVLFJ@I-love.SAKURA.ne.jp>
[not found] ` <201801102049.BGJ13564.OOOMtJLSFQFVHF@I-love.SAKURA.ne.jp>
[not found] ` <20180110124519.GU1732@dhcp22.suse.cz>
[not found] ` <201801102237.BED34322.QOOJMFFFHVLSOt@I-love.SAKURA.ne.jp>
[not found] ` <20180111135721.GC1732@dhcp22.suse.cz>
2018-01-11 14:11 ` [mm? 4.15-rc7] Random oopses under memory pressure Tetsuo Handa
2018-01-11 14:21 ` Michal Hocko
2018-01-11 14:37 ` Tetsuo Handa
2018-01-12 1:31 ` [mm " Tetsuo Handa
2018-01-12 1:42 ` Linus Torvalds [this message]
2018-01-12 11:22 ` Tetsuo Handa
2018-01-14 11:54 ` Tetsuo Handa
2018-01-15 23:05 ` Linus Torvalds
2018-01-16 1:15 ` [mm 4.15-rc8] " Tetsuo Handa
2018-01-16 2:14 ` Linus Torvalds
2018-01-16 8:06 ` Dave Hansen
2018-01-16 8:37 ` Ingo Molnar
2018-01-16 19:30 ` Linus Torvalds
2018-01-16 17:33 ` Tetsuo Handa
2018-01-16 19:34 ` Linus Torvalds
2018-01-17 11:08 ` Tetsuo Handa
2018-01-11 18:11 ` [mm? 4.15-rc7] " Linus Torvalds
2018-01-11 20:59 ` Tetsuo Handa
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