Bug#849366: Acknowledgement (Debian8.2 cannot handle memory hot-add)

[Yanhui He]

Hi,

Thanks for Ben’s reply!


Control: reassign -1 src:linux 3.16.36-1+deb8u2
Control: found -1 4.9.25-1
Control: retitle -1 [i386] Memory hotplug not enabled

On Mon, 26 Dec 2016 09:59:12 + Yanhui He  wrote:
[...]
Digging further, looking at /boot/config-3.16.0-4-686-pae we've
noticed that CONFIG_MEMORY_HOTPLUG is not in there. This means the
debian's kernel cannot handle memory hot plug.
[...]

We enable it for all configurations that also have SPARSEMEM enabled,
which are 64-bit x86, powerpc and s390 plus sh4.

So far as I know, it's not generally useful on i386.  No-one runs 32-
bit operating systems on real hardware with memory hotplug, and most VM
managers use ballooning to adjust guest RAM.

Ben.


Sorry for the wrong test method!

I have tested on Debian 9.0 RC3 64bit, then modified the content of 
"/sys/devices/system/memory/memoryXX/state" from "offline" to "online" (XX 
denotes the new added memory files).

The hot-added memory can be seen by command of “free -m” on Debian9.0 RC3 64bit.

This bug is resolved,  thanks!

--
Best Regards,
Yanhui


On 12/05/2017, 3:23 PM, "Yanhui He"  wrote:

Hi,

I have tested Debian 9.0 RC3 memory hot-adding and the problem is still 
existed.

Would you please help me take a look?


Thanks!

--
Best Regards,
Yanhui

On 26/12/2016, 5:57 PM, "Debian Bug Tracking System" 
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Bug#849366: FW: Bug#849366: Acknowledgement (Debian8.2 cannot handle memory hot-add)

[Roger Shimizu]

On Fri, 12 May 2017 07:23:57 +
Yanhui He  wrote:

> Hi,
> 
> I have tested Debian 9.0 RC3 memory hot-adding and the problem is still 
> existed.
> 
> Would you please help me take a look?

Please avoid top-posting.
If you report kernel bug, please use "reportbug kernel" command. [0]

[0] https://wiki.debian.org/DebianKernelReportingBugs

For the specific problem you report, could you inform what upstream
patch can support that feature? Thank you!

Cheers,
-- 
Roger Shimizu, GMT +9 Tokyo
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Bug#849366: FW: Bug#849366: Acknowledgement (Debian8.2 cannot handle memory hot-add)

[Yanhui He]

Hi,

I have tested Debian 9.0 RC3 memory hot-adding and the problem is still existed.

Would you please help me take a look?


Thanks!

--
Best Regards,
Yanhui

On 26/12/2016, 5:57 PM, "Debian Bug Tracking System"  
wrote:

Thank you for filing a new Bug report with Debian.

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