From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Nicolas Pitre <nico@fluxnic.net>
Cc: Linus Walleij <linus.walleij@linaro.org>,
Yanfei Xu <yanfei.xu@windriver.com>,
Mike Rapoport <rppt@kernel.org>, Ard Biesheuvel <ardb@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Hailong liu <carver4lio@163.com>,
Tian Tao <tiantao6@hisilicon.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/4] ARM: change vmalloc_min to vmalloc_start
Date: Fri, 28 May 2021 10:55:58 +0100 [thread overview]
Message-ID: <20210528095558.GN30436@shell.armlinux.org.uk> (raw)
In-Reply-To: <8q526rs-853n-5q80-r9pn-87sso759r13@syhkavp.arg>
On Tue, May 18, 2021 at 06:32:43PM -0400, Nicolas Pitre wrote:
> On Tue, 18 May 2021, Nicolas Pitre wrote:
>
> > On Wed, 19 May 2021, Linus Walleij wrote:
> >
> > > On Tue, May 18, 2021 at 2:15 PM Russell King (Oracle)
> > > <rmk+kernel@armlinux.org.uk> wrote:
> > >
> > > > Change the current vmalloc_min, which is supposed to be the lowest
> > > > address of vmalloc space including the VMALLOC_OFFSET, to vmalloc_start
> > > > which does not include VMALLOC_OFFSET.
> > > >
> > > > Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> > >
> > > Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> > >
> > > > +static unsigned long __initdata vmalloc_start = VMALLOC_END - (240 << 20);
> > >
> > > When I first read this it took me some time to figure out what was
> > > going on here, so if you have time, please fold in a comment
> > > with some explanation of that (240 << 20) thing, in some blog
> > > post I described it as "an interesting way to write 0x0f000000"
> > > but I suppose commit 0536bdf33faf chose this way for a
> > > specific reason? (Paging Nico if he can explain it.)
> >
> > That's an alternative (and deprecated) way to write MB(240).
>
> And it seems that MB() isn't globally defined either. Oh well.
I could add a patch on the end of the series changing it to 240 * SZ_1M
which will likely be clearer.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-05-28 9:58 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-18 11:12 [PATCH] arm: make the size of vmalloc in cmdline and meminfo uniform Yanfei Xu
2021-05-18 11:29 ` Russell King (Oracle)
2021-05-18 12:06 ` Russell King (Oracle)
2021-05-18 12:15 ` [PATCH 1/4] ARM: change vmalloc_min to be unsigned long Russell King (Oracle)
2021-05-18 22:09 ` Linus Walleij
2021-05-18 12:15 ` [PATCH 2/4] ARM: use a temporary variable to hold maximum vmalloc size Russell King (Oracle)
2021-05-18 22:11 ` Linus Walleij
2021-05-18 12:15 ` [PATCH 3/4] ARM: change vmalloc_min to vmalloc_start Russell King (Oracle)
2021-05-18 22:19 ` Linus Walleij
2021-05-18 22:26 ` Nicolas Pitre
2021-05-18 22:32 ` Nicolas Pitre
2021-05-18 22:34 ` Linus Walleij
2021-05-18 22:38 ` Nicolas Pitre
2021-05-28 9:55 ` Russell King (Oracle) [this message]
2021-05-19 4:41 ` Xu, Yanfei
2021-05-20 9:00 ` Russell King (Oracle)
2021-05-28 2:52 ` Xu, Yanfei
2021-05-28 10:00 ` Russell King (Oracle)
2021-05-19 5:25 ` Xu, Yanfei
2021-05-18 12:15 ` [PATCH 4/4] ARM: change vmalloc_start to vmalloc_size Russell King (Oracle)
2021-05-18 22:21 ` Linus Walleij
2021-05-19 4:39 ` [PATCH] arm: make the size of vmalloc in cmdline and meminfo uniform Xu, Yanfei
2021-05-19 5:32 ` Xu, Yanfei
2021-05-20 4:52 ` Alexander Dahl
2021-05-20 6:50 ` Xu, Yanfei
2021-05-28 10:11 ` [PATCH v2 1/6] ARM: change vmalloc_min to be unsigned long Russell King (Oracle)
2021-05-28 13:10 ` Xu, Yanfei
2021-05-28 10:11 ` [PATCH v2 2/6] ARM: use a temporary variable to hold maximum vmalloc size Russell King (Oracle)
2021-05-28 13:11 ` Xu, Yanfei
2021-05-28 10:11 ` [PATCH v2 3/6] ARM: change vmalloc_min to vmalloc_start Russell King (Oracle)
2021-05-28 12:21 ` Linus Walleij
2021-05-28 13:05 ` Xu, Yanfei
2021-05-28 10:11 ` [PATCH v2 4/6] ARM: change vmalloc_start to vmalloc_size Russell King (Oracle)
2021-05-28 12:22 ` Linus Walleij
2021-05-28 13:15 ` Xu, Yanfei
2021-05-28 10:11 ` [PATCH v2 5/6] ARM: use "* SZ_1M" rather than "<< 20" Russell King (Oracle)
2021-05-28 12:23 ` Linus Walleij
2021-05-28 13:17 ` Xu, Yanfei
2021-05-28 10:11 ` [PATCH v2 6/6] ARM: use MiB for vmalloc sizes Russell King (Oracle)
2021-05-28 12:24 ` Linus Walleij
2021-05-28 13:20 ` Xu, Yanfei
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=20210528095558.GN30436@shell.armlinux.org.uk \
--to=linux@armlinux.org.uk \
--cc=akpm@linux-foundation.org \
--cc=ardb@kernel.org \
--cc=carver4lio@163.com \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=nico@fluxnic.net \
--cc=rppt@kernel.org \
--cc=tiantao6@hisilicon.com \
--cc=yanfei.xu@windriver.com \
/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).