Re: [PATCH Bug fix 0/5] Bug fix for physical memory hot-remove.

Michal Hocko
2013-01-28T08:15:53Z

On Mon 28-01-13 09:33:49, Tang Chen wrote:
> On 01/25/2013 09:17 PM, Michal Hocko wrote:
> >On Wed 23-01-13 06:29:31, Simon Jeons wrote:
> >>On Tue, 2013-01-22 at 19:42 +0800, Tang Chen wrote:
> >>>Here are some bug fix patches for physical memory hot-remove. All these
> >>>patches are based on the latest -mm tree.
> >>>git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm
> >>>
> >>>And patch1 and patch3 are very important.
> >>>patch1: free compound pages when freeing memmap, otherwise the kernel
> >>> will panic the next time memory is hot-added.
> >>>patch3: the old way of freeing pagetable pages was wrong. We should never
> >>> split larger pages into small ones.
> >>>
> >>>
> >>
> >>Hi Tang,
> >>
> >>I remember your big physical memory hot-remove patchset has already
> >>merged by Andrew, but where I can find it? Could you give me git tree
> >>address?
> >
> >Andrew tree is also mirrored into a git tree.
> >http://git.kernel.org/?p=linux/kernel/git/mhocko/mm.git;a=summary
> >
> >It contains only Memory management patches on top of the last major
> >release (since-.X.Y branch).
>
> Hi Michal,
>
> I'm not sure I got your meaning. :)

Well, the mirror tree gets updated when Andrew releases mmotm and quite
often even when mmots is released.
All patches in the mm section are applied.

> In http://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm,
> I can find the following commit.
>
> commit deed0460e01b3968f2cf46fb94851936535b7e0d
> Author: Tang Chen <tangchen@cn.fujitsu.com>
> Date: Sat Jan 19 11:07:13 2013 +1100
>
> memory-hotplug: do not allocate pgdat if it was not freed when
> offline.
>
>
> This is one of memory hot-remove patches. Please try to update the
> mirror tree,
> and try to find the above commit.

That one is in my mirror tree as f48bf999 (memory-hotplug: do not
allocate pdgat if it was not freed when offline.).
--
Michal Hocko
SUSE Labs