From: Michael Schmitz <schmitzmic@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Linux/m68k <linux-m68k@lists.linux-m68k.org>,
Linux Kernel Development <linux-kernel@vger.kernel.org>,
Will Deacon <will@kernel.org>
Subject: Re: [PATCH 0/5] Rewrite Motorola MMU page-table layout
Date: Thu, 30 Jan 2020 20:31:13 +1300 [thread overview]
Message-ID: <b72358cc-ddd2-52d6-7eed-c88bab46e6f1@gmail.com> (raw)
In-Reply-To: <20200129193109.GS14914@hirez.programming.kicks-ass.net>
Peter,
Am 30.01.2020 um 08:31 schrieb Peter Zijlstra:
> On Thu, Jan 30, 2020 at 07:52:11AM +1300, Michael Schmitz wrote:
>> Peter,
>>
>> On Thu, Jan 30, 2020 at 12:54 AM Peter Zijlstra <peterz@infradead.org> wrote:
>>>
>>> On Wed, Jan 29, 2020 at 11:49:13AM +0100, John Paul Adrian Glaubitz wrote:
>>>
>>>>> [1] https://wiki.debian.org/M68k/QemuSystemM68k
>>>
>>> Now, if only debian would actually ship that :/
>>>
>>> AFAICT that emulates a q800 which is another 68040 and should thus not
>>> differ from ARAnyM.
>>>
>>> I'm fairly confident in the 040 bits, it's the 020/030 things that need
>>> coverage.
>>
>> I'll take a look - unless this eats up way more kernel memory for page
>> tables, it should still boot on my Falcon.
>
> It should actually be better in most cases I think, since we no longer
> require all 16 pte-tables to map consecutive (virtual) memory.
Not much difference:
total used free shared buffers cached
Mem: 10712 10120 592 0 1860 2276
-/+ buffers/cache: 5984 4728
Swap: 2097144 1552 2095592
vs. vanilla 5.5rc5:
total used free shared buffers cached
Mem: 10716 10104 612 0 1588 2544
-/+ buffers/cache: 5972 4744
Swap: 2097144 1296 2095848
By sheer coincidence, the boot with your patch series happened to run a
full filesystem check on the root filesystem, so I'd say it got a good
workout re: paging and swapping (even though it's just a paltry 4 GB).
Haven't tried any VM stress testing yet (not sure what to do for that;
it's been years since I tried that sort of stuff).
Cheers,
Michael
next prev parent reply other threads:[~2020-01-30 7:31 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-29 10:39 [PATCH 0/5] Rewrite Motorola MMU page-table layout Peter Zijlstra
2020-01-29 10:39 ` [PATCH 1/5] m68k,mm: Restructure motorola mmu " Peter Zijlstra
2020-01-29 10:39 ` [PATCH 2/5] m68k,mm: Improve kernel_page_table() Peter Zijlstra
2020-01-29 10:39 ` [PATCH 3/5] m68k,mm: Use table allocator for pgtables Peter Zijlstra
2020-01-29 12:11 ` Will Deacon
2020-01-29 12:24 ` Peter Zijlstra
2020-01-29 10:39 ` [PATCH 4/5] m68k,mm: Extend table allocator for multiple sizes Peter Zijlstra
2020-01-29 12:17 ` Will Deacon
2020-01-29 12:43 ` Peter Zijlstra
2020-01-29 13:15 ` Will Deacon
2020-01-29 10:39 ` [PATCH 5/5] m68k,mm: Fully initialize the page-table allocator Peter Zijlstra
2020-01-29 10:49 ` [PATCH 0/5] Rewrite Motorola MMU page-table layout John Paul Adrian Glaubitz
2020-01-29 11:54 ` Peter Zijlstra
2020-01-29 12:05 ` John Paul Adrian Glaubitz
2020-01-29 12:30 ` Peter Zijlstra
2020-01-29 18:52 ` Michael Schmitz
2020-01-29 19:31 ` Peter Zijlstra
2020-01-30 7:31 ` Michael Schmitz [this message]
2020-01-30 8:16 ` Peter Zijlstra
2020-01-30 19:12 ` Michael Schmitz
2020-01-31 6:31 ` Greg Ungerer
2020-01-31 9:38 ` Will Deacon
2020-01-31 10:22 ` Peter Zijlstra
2020-01-31 11:14 ` Peter Zijlstra
2020-01-31 11:18 ` Will Deacon
2020-01-31 11:31 ` Peter Zijlstra
2020-01-31 11:43 ` Will Deacon
2020-01-31 13:04 ` Greg Ungerer
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