lkml.org 
[lkml]   [2013]   [Mar]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC][PATCH 0/9] extend hugepage migration
Hi Naoya,
On 02/22/2013 03:41 AM, Naoya Horiguchi wrote:
> Hi,
>
> Hugepage migration is now available only for soft offlining (moving
> data on the half corrupted page to another page to save the data).
> But it's also useful some other users of page migration, so this
> patchset tries to extend some of such users to support hugepage.
>
> The targets of this patchset are NUMA related system calls (i.e.
> migrate_pages(2), move_pages(2), and mbind(2)), and memory hotplug.
> This patchset does not extend page migration in memory compaction,
> because I think that users of memory compaction mainly expect to
> construct thp by arranging raw pages but hugepage migration doesn't
> help it.
> CMA, another user of page migration, can have benefit from hugepage
> migration, but is not enabled to support it now. This is because
> I've never used CMA and need to learn more to extend and/or test
> hugepage migration in CMA. I'll add this in later version if it
> becomes ready, or will post as a separate patchset.
>
> Hugepage migration of 1GB hugepage is not enabled for now, because
> I'm not sure whether users of 1GB hugepage really want it.
> We need to spare free hugepage in order to do migration, but I don't
> think that users want to 1GB memory to idle for that purpose
> (currently we can't expand/shrink 1GB hugepage pool after boot).
>
> Could you review and give me some comments/feedbacks?
>
> Thanks,
> Naoya Horiguchi
> ---
> Easy patch access:
> git@github.com:Naoya-Horiguchi/linux.git
> branch:extend_hugepage_migration
>
> Test code:
> git@github.com:Naoya-Horiguchi/test_hugepage_migration_extension.git

git clone
git@github.com:Naoya-Horiguchi/test_hugepage_migration_extension.git
Cloning into test_hugepage_migration_extension...
Permission denied (publickey).
fatal: The remote end hung up unexpectedly

>
> Naoya Horiguchi (9):
> migrate: add migrate_entry_wait_huge()
> migrate: make core migration code aware of hugepage
> soft-offline: use migrate_pages() instead of migrate_huge_page()
> migrate: clean up migrate_huge_page()
> migrate: enable migrate_pages() to migrate hugepage
> migrate: enable move_pages() to migrate hugepage
> mbind: enable mbind() to migrate hugepage
> memory-hotplug: enable memory hotplug to handle hugepage
> remove /proc/sys/vm/hugepages_treat_as_movable
>
> Documentation/sysctl/vm.txt | 16 ------
> include/linux/hugetlb.h | 25 ++++++++--
> include/linux/mempolicy.h | 2 +-
> include/linux/migrate.h | 12 ++---
> include/linux/swapops.h | 4 ++
> kernel/sysctl.c | 7 ---
> mm/hugetlb.c | 98 ++++++++++++++++++++++++++++--------
> mm/memory-failure.c | 20 ++++++--
> mm/memory.c | 6 ++-
> mm/memory_hotplug.c | 51 +++++++++++++++----
> mm/mempolicy.c | 61 +++++++++++++++--------
> mm/migrate.c | 119 ++++++++++++++++++++++++++++++--------------
> mm/page_alloc.c | 12 +++++
> mm/page_isolation.c | 5 ++
> 14 files changed, 311 insertions(+), 127 deletions(-)
>
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@kvack.org. For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>



\
 
 \ /
  Last update: 2013-03-20 01:01    [W:0.294 / U:0.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site