From: Serge Semin <fancer.lancer@gmail.com>
To: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: ralf@linux-mips.org, miodrag.dinic@mips.com, jhogan@kernel.org,
goran.ferenc@mips.com, david.daney@cavium.com,
paul.gortmaker@windriver.com, paul.burton@mips.com,
alex.belits@cavium.com, Steven.Hill@cavium.com,
matt.redfearn@mips.com, kumba@gentoo.org,
marcin.nowakowski@mips.com, James.hogan@mips.com,
Peter.Wotton@mips.com, Sergey.Semin@t-platforms.ru,
linux-mips@linux-mips.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 00/14] MIPS: memblock: Switch arch code to NO_BOOTMEM
Date: Thu, 25 Jan 2018 23:17:49 +0300 [thread overview]
Message-ID: <20180125201749.GA7074@mobilestation> (raw)
In-Reply-To: <f8626b9b-56b7-f1b0-6771-9cf573050bb4@nokia.com>
Hello Alexander,
On Thu, Jan 25, 2018 at 06:58:07PM +0100, Alexander Sverdlin <alexander.sverdlin@nokia.com> wrote:
> Hello Serge,
>
> On 17/01/18 23:22, Serge Semin wrote:
> > The patchset is applied on top of kernel 4.15-rc8 and can be found
> > submitted at my repo:
> > https://github.com/fancer/Linux-kernel-MIPS-memblock-project
>
> I've tested the Linux from your repo on Octeon2 and it looks good to me.
> I've only tested startup though. Therefore,
>
> Tested-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
>
Great! Thank you very much for doing this. I'll include the info about all the
tested platforms to the cover letter of the next patchset.
> I've noticed one positive effect I cannot explain -- with almost the same
> physical memory map I observe almost 2 megabytes more available memory
> after startup:
>
> without patches:
>
> root@(none):~ >free
> total used free shared buff/cache available
> Mem: 955040 16264 839948 80068 98828 810068
> Swap: 0 0 0
>
> memory map:
>
> memory: 0000000001090dc0 @ 0000000009000000 (usable after init)
> memory: 0000000005400000 @ 0000000002b00000 (usable)
> memory: 0000000000c00000 @ 0000000008200000 (usable)
> memory: 0000000004800000 @ 000000000a100000 (usable)
> memory: 000000001fc00000 @ 0000000020000000 (usable)
> memory: 0000000010000000 @ 0000000040000000 (usable)
> memory: 000000000190a9d0 @ 0000000001100000 (usable)
>
> ----------------------------------------
>
> with patches:
>
> root@(none):~ >free
> total used free shared buff/cache available
> Mem: 955028 14292 841884 80068 98852 811996
> Swap: 0 0 0
>
> memory map:
>
> memory: 0000000001090e00 @ 0000000009000000 (usable after init)
> memory: 0000000005400000 @ 0000000002b00000 (usable)
> memory: 0000000000c00000 @ 0000000008200000 (usable)
> memory: 0000000004800000 @ 000000000a100000 (usable)
> memory: 000000001fc00000 @ 0000000020000000 (usable)
> memory: 0000000010000000 @ 0000000040000000 (usable)
> memory: 000000000190c9d0 @ 0000000001100000 (usable)
>
That's interesting. My suggestion is that the old code used to reserve all
the memory below kernel _end symbol. So if the kernel isn't loaded right at
the start of the lowest memory range, then there is going to be a wasted
memory between the range start and the _text kernel symbol:
[PATCH 04/14] MIPS: memblock: Discard bootmem initialization
My code reserves only the memory occupied by the kernel within [_text, _end]:
[PATCH 05/14] MIPS: memblock: Add reserved memory regions to memblock
There might be some other reason of the lesser memory consumption though.
Hopefully I didn't forget to reserve some necessary memory ranges.)
Regards,
-Sergey
>
> > Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
> >
> > Serge Semin (14):
> > MIPS: memblock: Add RESERVED_NOMAP memory flag
> > MIPS: memblock: Surely map BSS kernel memory section
> > MIPS: memblock: Reserve initrd memory in memblock
> > MIPS: memblock: Discard bootmem initialization
> > MIPS: memblock: Add reserved memory regions to memblock
> > MIPS: memblock: Reserve kdump/crash regions in memblock
> > MIPS: memblock: Mark present sparsemem sections
> > MIPS: memblock: Simplify DMA contiguous reservation
> > MIPS: memblock: Allow memblock regions resize
> > MIPS: memblock: Perform early low memory test
> > MIPS: memblock: Print out kernel virtual mem layout
> > MIPS: memblock: Discard bootmem from Loongson3 code
> > MIPS: memblock: Discard bootmem from SGI IP27 code
> > MIPS: memblock: Deactivate bootmem allocator
>
> --
> Best regards,
> Alexander Sverdlin.
next prev parent reply other threads:[~2018-01-25 20:17 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-17 22:22 [PATCH 00/14] MIPS: memblock: Switch arch code to NO_BOOTMEM Serge Semin
2018-01-17 22:22 ` [PATCH 01/14] MIPS: memblock: Add RESERVED_NOMAP memory flag Serge Semin
2018-01-17 22:23 ` [PATCH 02/14] MIPS: memblock: Surely map BSS kernel memory section Serge Semin
2018-01-22 16:35 ` Matt Redfearn
2018-01-22 21:47 ` Serge Semin
2018-01-23 11:03 ` Matt Redfearn
2018-01-23 19:27 ` Serge Semin
2018-01-24 9:49 ` Matt Redfearn
2018-01-24 10:03 ` Serge Semin
2018-01-17 22:23 ` [PATCH 03/14] MIPS: memblock: Reserve initrd memory in memblock Serge Semin
2018-01-17 22:23 ` [PATCH 04/14] MIPS: memblock: Discard bootmem initialization Serge Semin
2018-01-17 22:23 ` [PATCH 05/14] MIPS: memblock: Add reserved memory regions to memblock Serge Semin
2018-01-17 22:23 ` [PATCH 06/14] MIPS: memblock: Reserve kdump/crash regions in memblock Serge Semin
2018-01-17 22:23 ` [PATCH 07/14] MIPS: memblock: Mark present sparsemem sections Serge Semin
2018-01-24 6:13 ` Marcin Nowakowski
2018-01-24 7:27 ` Serge Semin
2018-01-17 22:23 ` [PATCH 08/14] MIPS: memblock: Simplify DMA contiguous reservation Serge Semin
2018-01-17 22:23 ` [PATCH 09/14] MIPS: memblock: Allow memblock regions resize Serge Semin
2018-01-17 22:23 ` [PATCH 10/14] MIPS: memblock: Perform early low memory test Serge Semin
2018-01-17 22:23 ` [PATCH 11/14] MIPS: memblock: Print out kernel virtual mem layout Serge Semin
2018-01-18 20:03 ` Florian Fainelli
2018-01-18 20:18 ` Serge Semin
2018-01-19 7:59 ` Matt Redfearn
2018-01-19 14:27 ` Serge Semin
2018-01-23 15:35 ` Matt Redfearn
2018-01-23 19:10 ` Serge Semin
2018-01-24 9:46 ` Matt Redfearn
2018-01-24 10:08 ` Serge Semin
2018-01-17 22:23 ` [PATCH 12/14] MIPS: memblock: Discard bootmem from Loongson3 code Serge Semin
2018-01-23 22:28 ` Jiaxun Yang
2018-01-23 19:36 ` Serge Semin
2018-01-17 22:23 ` [PATCH 13/14] MIPS: memblock: Discard bootmem from SGI IP27 code Serge Semin
2018-01-17 22:23 ` [PATCH 14/14] MIPS: memblock: Deactivate bootmem allocator Serge Semin
2018-01-23 23:59 ` James Hogan
2018-01-24 8:28 ` Serge Semin
2018-01-22 16:36 ` [PATCH 00/14] MIPS: memblock: Switch arch code to NO_BOOTMEM Matt Redfearn
2018-01-22 21:33 ` Serge Semin
2018-01-23 11:29 ` Mathieu Malaterre
2018-01-23 14:01 ` Matt Redfearn
2018-01-25 17:58 ` Alexander Sverdlin
2018-01-25 20:17 ` Serge Semin [this message]
2018-01-31 0:21 ` Serge Semin
2018-02-02 3:54 ` [PATCH v2 00/15] " Serge Semin
2018-02-02 3:54 ` [PATCH v2 01/15] MIPS: memblock: Add RESERVED_NOMAP memory flag Serge Semin
2018-02-13 11:21 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 02/15] MIPS: memblock: Surely map BSS kernel memory section Serge Semin
2018-02-13 11:22 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 03/15] MIPS: memblock: Reserve initrd memory in memblock Serge Semin
2018-02-13 11:22 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 04/15] MIPS: memblock: Discard bootmem initialization Serge Semin
2018-02-13 11:28 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 05/15] MIPS: KASLR: Drop relocatable fixup from reservation_init Serge Semin
2018-02-13 11:30 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 06/15] MIPS: memblock: Add reserved memory regions to memblock Serge Semin
2018-02-13 13:44 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 07/15] MIPS: memblock: Reserve kdump/crash regions in memblock Serge Semin
2018-02-13 13:45 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 08/15] MIPS: memblock: Mark present sparsemem sections Serge Semin
2018-02-13 13:50 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 09/15] MIPS: memblock: Simplify DMA contiguous reservation Serge Semin
2018-02-13 13:51 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 10/15] MIPS: memblock: Allow memblock regions resize Serge Semin
2018-02-13 13:55 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 11/15] MIPS: memblock: Perform early low memory test Serge Semin
2018-02-13 14:01 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 12/15] MIPS: memblock: Print out kernel virtual mem layout Serge Semin
2018-02-13 14:05 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 13/15] MIPS: memblock: Discard bootmem from Loongson3 code Serge Semin
2018-02-13 14:09 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 14/15] MIPS: memblock: Discard bootmem from SGI IP27 code Serge Semin
2018-02-13 14:17 ` Matt Redfearn
2018-02-02 3:54 ` [PATCH v2 15/15] MIPS: memblock: Deactivate bootmem allocator Serge Semin
2018-02-13 14:18 ` Matt Redfearn
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=20180125201749.GA7074@mobilestation \
--to=fancer.lancer@gmail.com \
--cc=James.hogan@mips.com \
--cc=Peter.Wotton@mips.com \
--cc=Sergey.Semin@t-platforms.ru \
--cc=Steven.Hill@cavium.com \
--cc=alex.belits@cavium.com \
--cc=alexander.sverdlin@nokia.com \
--cc=david.daney@cavium.com \
--cc=goran.ferenc@mips.com \
--cc=jhogan@kernel.org \
--cc=kumba@gentoo.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@linux-mips.org \
--cc=marcin.nowakowski@mips.com \
--cc=matt.redfearn@mips.com \
--cc=miodrag.dinic@mips.com \
--cc=paul.burton@mips.com \
--cc=paul.gortmaker@windriver.com \
--cc=ralf@linux-mips.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).