From: Nicholas Piggin <npiggin@gmail.com>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
ambrosehua@gmail.com, Huacai Chen <chenhc@lemote.com>,
Gao Juxin <gaojuxin@loongson.cn>,
Huang Pei <huangpei@loongson.cn>,
Jiaxun Yang <jiaxun.yang@flygoat.com>,
linux-arch@vger.kernel.org, linux-mips@vger.kernel.org,
linux-mm@kvack.org, Li Xuefeng <lixuefeng@loongson.cn>,
Bibo Mao <maobibo@loongson.cn>,
Paul Burton <paulburton@kernel.org>,
Yang Tiezhu <yangtiezhu@loongson.cn>,
Fuxin Zhang <zhangfx@lemote.com>
Subject: Re: [PATCH] MIPS: make userspace mapping young by default
Date: Thu, 04 Feb 2021 21:27:34 +1000 [thread overview]
Message-ID: <1612437994.rfmweyhtiy.astroid@bobo.none> (raw)
In-Reply-To: <20210204103459.GA10558@alpha.franken.de>
Excerpts from Thomas Bogendoerfer's message of February 4, 2021 8:34 pm:
> On Thu, Feb 04, 2021 at 01:29:26PM +1000, Nicholas Piggin wrote:
>> Excerpts from Huang Pei's message of February 4, 2021 11:39 am:
>> > MIPS page fault path(except huge page) takes 3 exceptions (1 TLB Miss
>> > + 2 TLB Invalid), butthe second TLB Invalid exception is just
>> > triggered by __update_tlb from do_page_fault writing tlb without
>> > _PAGE_VALID set. With this patch, user space mapping prot is made
>> > young by default (with both _PAGE_VALID and _PAGE_YOUNG set),
>> > and it only take 1 TLB Miss + 1 TLB Invalid exception
>> >
>> > Remove pte_sw_mkyoung without polluting MM code and make page fault
>> > delay of MIPS on par with other architecture
>> >
>> > Signed-off-by: Huang Pei <huangpei@loongson.cn>
>>
>> Could we merge this? For the core code,
>
> sure, but IMHO I should only merge the MIPS part, correct ?
You could ack it for MIPS and Andrew could take it through his tree
would avoid dependencies.
Thanks,
Nick
next prev parent reply other threads:[~2021-02-04 11:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-04 1:39 Huang Pei
2021-02-04 3:29 ` Nicholas Piggin
2021-02-04 4:46 ` 黄沛
2021-02-04 10:34 ` Thomas Bogendoerfer
2021-02-04 11:27 ` Nicholas Piggin [this message]
2021-02-04 15:22 ` Thomas Bogendoerfer
2021-02-05 23:41 ` Andrew Morton
2021-02-08 17:44 ` Christophe Leroy
2021-02-08 19:48 ` Andrew Morton
-- strict thread matches above, loose matches on Subject: below --
2020-09-19 7:39 Huang Pei
2020-09-04 8:49 Huang Pei
2020-09-07 8:50 ` maobibo
2020-09-07 10:35 ` Huang Pei
2020-09-07 13:10 ` maobibo
2020-07-26 8:32 [PATCH v2 1/2] MIPS: Set page access bit with pgprot on platforms with RIXI Thomas Bogendoerfer
2020-08-25 3:20 ` [PATCH v2 1/2] MIPS: Set page access bit with pgprot on Huang Pei
2020-08-25 3:20 ` [PATCH] MIPS: make userspace mapping young by default Huang Pei
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