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From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To: Feiyang Chen <chris.chenfeiyang@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>,
	tglx@linutronix.de, peterz@infradead.org, luto@kernel.org,
	arnd@arndb.de, Feiyang Chen <chenfeiyang@loongson.cn>,
	linux-mips@vger.kernel.org, linux-arch@vger.kernel.org,
	chenhuacai@kernel.org, Zhou Yanjie <zhouyu@wanyeetech.com>,
	"H. Nikolaus Schaller" <hns@goldelico.com>
Subject: Re: [PATCH v2 0/2] MIPS: convert to generic entry
Date: Tue, 21 Sep 2021 17:57:08 +0200	[thread overview]
Message-ID: <20210921155708.GA12237@alpha.franken.de> (raw)
In-Reply-To: <CACWXhK=YW6Kn9FO1JrU1mP_xxMnEF_ajkD6hou=4rpgR2hOM5w@mail.gmail.com>

On Tue, Sep 14, 2021 at 05:30:14PM +0800, Feiyang Chen wrote:
> On Tue, 14 Sept 2021 at 16:54, Jiaxun Yang <jiaxun.yang@flygoat.com> wrote:
> >
> >
> >
> > 在 2021/9/14 2:50, Feiyang Chen 写道:
> > > Convert MIPS to use the generic entry infrastructure from
> > > kernel/entry/*.
> > >
> > > v2: Use regs->regs[27] to mark whether to restore all registers in
> > > handle_sys and enable IRQ stack.
> > Hi Feiyang,
> >
> > Thanks for your patch, could you please expand how could this improve
> > the performance?
> >
> 
> Hi, Jiaxun,
> 
> We always restore all registers in handle_sys in the v1 of the
> patchset. Since regs->regs[27] is marked where we need to restore all
> registers, now we simply use it as the return value of do_syscall to
> determine whether we can only restore partial registers in handle_sys.

can people, who provided performance numbers for v1 do the same for v2 ?

Thomas,

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]

  reply	other threads:[~2021-09-21 15:58 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-14  1:50 [PATCH v2 0/2] MIPS: convert to generic entry Feiyang Chen
2021-09-14  1:50 ` [PATCH v2 1/2] MIPS: convert syscall " Feiyang Chen
2021-09-14  1:50 ` [PATCH v2 2/2] MIPS: convert irq " Feiyang Chen
2021-09-14  8:54 ` [PATCH v2 0/2] MIPS: convert " Jiaxun Yang
2021-09-14  9:30   ` Feiyang Chen
2021-09-21 15:57     ` Thomas Bogendoerfer [this message]
2021-09-23 14:33       ` Zhou Yanjie
2021-10-13 15:00         ` Zhou Yanjie
2021-10-18 19:32           ` Maciej W. Rozycki
2021-10-19  2:22             ` Feiyang Chen
2021-10-19  8:33               ` Maciej W. Rozycki
2021-10-22  2:19                 ` Feiyang Chen
2021-09-23 23:51       ` Jiaxun Yang

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