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Re: D-Link DNS-323 support dropped in Debian stretch

Cross-posted to 2 groups.

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Hello,

On 2018-03-26 11:36, Roger Shimizu wrote:
> [ loop debian-kernel ML ]
> 
> On Mon, Mar 26, 2018 at 7:05 PM, Martin Michlmayr <tbm@cyrius.com> 
> wrote:
>> * basti <mailinglist@unix-solution.de> [2018-03-26 12:00]:
>>> Can it be an option to run Stretch with older Kernel from jessie?
>> 
>> I don't know.
>> 
>>> And can you please explain why it is dropped, I see that qnap TS-x09 
>>> is
>>> still supported.
>> 
>> DNS-323 only has 1.5 MB space for the kernel.  TS-x09 has 2 MB.  We're
>> constantly pushing against these limits.  1.5 MB wasn't doable in
>> stretch and 2 MB is no longer doable in buster.

I think with a small amount of effort it can be done.

> armel support for sid kernel was (temporally) disabled last month, due
> to over size (>2MB).
> I just added armel back last weekend by extend the limit from 2MB to
> 2.7MB, which means it drops support for qnap.

I'm pleased it has returned because I have two Dreamplugs and they load
the kernel from SD and there is no 2MB limitation.  I am using Stock
Debian with a stock kernel and stock u-boot, which I am very pleased 
about.

> There's one possibility that can bring back qnap, or even D-Link DNS 
> device:
> - create a new flavour for armel, such as armel-none-mini
> - the new flavour will disable many features that other common kernels
> have, such as wireless, crypto, etc.

I certainly think that if people are using Debian successfully then some
effort should be expended to continue support if the hardware still 
works.

I've done this before and these custom kernels tend to be quite tailored
to the device, which may result in quite a few variants.  Is that 
possible?

> The question is whether it deserves the effort, not only creating the
> new flavour, but also maintaining it during the whole buster period.
> So I want to know how many active users for D-Link DNS and QNAP devices 
> now?

Here is a patch that will reduce the size of the kernel a bit and 
doesn't
(in my opinion) make the kernel any less useable (or less "Debian").  
I'm
not aware of any Marvell devices that would need VT support, is that 
correct?

-rw-r--r-- 1 leigh leigh 1986320 Mar 23 12:10 vmlinuz-4.16.0-rc6-marvell

Regards,

Leigh.
-- 

diff --git a/debian/config/armel/config.marvell 
b/debian/config/armel/config.marvell
index c5703aeeb..7235cb767 100644
--- a/debian/config/armel/config.marvell
+++ b/debian/config/armel/config.marvell
@@ -121,6 +121,7 @@ CONFIG_SUN_PARTITION=y
  ##
  # CONFIG_CRYPTO_FIPS is not set
  CONFIG_CRYPTO_SHA256=m
+CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y

  ##
  ## file: drivers/ata/Kconfig
@@ -633,6 +634,11 @@ CONFIG_FB_XGI=m
  ##
  CONFIG_THERMAL=m
  CONFIG_KIRKWOOD_THERMAL=m
+#
+##
+## file: drivers/tty/Kconfig
+##
+# CONFIG_VT is not set

  ##
  ## file: drivers/tty/serial/8250/Kconfig
@@ -754,6 +760,8 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
  ## file: lib/Kconfig.debug
  ##
  # CONFIG_SCHEDSTATS is not set
+# CONFIG_CRC32_SLICEBY8 is not set
+CONFIG_CRC32_SLICEBY4=y

  ##
  ## file: mm/Kconfig

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Re: D-Link DNS-323 support dropped in Debian stretch Roger Shimizu <rogershimizu@gmail.com> - 2018-03-26 12:40 +0200
  Re: D-Link DNS-323 support dropped in Debian stretch basti <mailinglist@unix-solution.de> - 2018-03-26 14:20 +0200
  Re: D-Link DNS-323 support dropped in Debian stretch Leigh Brown <leigh@solinno.co.uk> - 2018-03-26 18:10 +0200
  Re: D-Link DNS-323 support dropped in Debian stretch Aaro Koskinen <aaro.koskinen@iki.fi> - 2018-03-27 20:50 +0200
    Re: D-Link DNS-323 support dropped in Debian stretch Ian Campbell <ijc@debian.org> - 2018-03-28 10:50 +0200
      Re: D-Link DNS-323 support dropped in Debian stretch Roger Shimizu <rogershimizu@gmail.com> - 2018-03-28 12:20 +0200
  Re: D-Link DNS-323 support dropped in Debian stretch Martin Michlmayr <tbm@cyrius.com> - 2018-03-28 03:30 +0200

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