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Date: Fri, 22 Jun 2012 09:41:56 +0200 From: Ingo Molnar <mingo@...nel.org> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, David Rientjes <rientjes@...gle.com>, Mel Gorman <mgorman@...e.de>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Ingo Molnar <mingo@...e.hu> Subject: Re: [patch 3.5-rc3] mm, mempolicy: fix mbind() to do synchronous migration * Ingo Molnar <mingo@...nel.org> wrote: > > I do still ask what the plans are for that patchset.. > > Somewhat off topic, but the main sched/numa objections were > over the mbind/etc. syscalls and the extra configuration space > - we dropped those bits and just turned it all into an > improved NUMA scheduling feature, as suggested by Peter and me > in the original discussion. > > There were no objections to that approach so the reworked NUMA > scheduling/balancing scheme is now in the scheduler tree > (tip:sched/core). > > The mbind/etc. syscall changes and all the related cleanups, > speedups and reorganization of the MM code are still in limbo. > > I dropped them with the rest of tip:sched/numa as nobody from > the MM side expressed much interest in them and I wanted to > keep things simple and not carry objected-to commits. >From your mail it appears that you weren't aware that this was all queued up (clearly our fault) - so here's a quick status dump, please let us know what you think and whether we can keep them. The ones with mm/ effect that we kept are these, which are needed for scheduler directed opportunistic/lazy memory migration between nodes: e9941dae8708 mm/mpol: Lazy migrate a process/vma a9ea2f1e496e mm/mpol: Make mempolicy home-node aware 5dca4a911980 mm/mpol: Split and explose some mempolicy functions f1b39afe3e55 mm/mpol: Introduce vma_put_policy() 9fc52f506a4e mm/mpol: Introduce vma_dup_policy() 6494a5f2cb89 mm/mpol: Simplify do_mbind() 65699050e8aa mm: Handle misplaced anon pages 4783af477d3d mm: Migrate misplaced page 147c5c460202 mm/mpol: Check for misplaced page 84f1e3478238 mm/mpol: Add MPOL_MF_NOOP 68d9661d42bf mm/mpol: Add MPOL_MF_LAZY ... 03ed7b538ca0 mm/mpol: Make MPOL_LOCAL a real policy e975d6ac08f3 mm/mpol: Remove NUMA_INTERLEAVE_HIT 8c41549ed1b3 mm/mpol: Re-implement check_*_range() using walk_page_range() 2ab41dd59922 mm: Optimize put_mems_allowed() usage Or with diffstats: e9941dae8708 mm/mpol: Lazy migrate a process/vma mm/mempolicy.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) a9ea2f1e496e mm/mpol: Make mempolicy home-node aware mm/mempolicy.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) 5dca4a911980 mm/mpol: Split and explose some mempolicy functions mm/mempolicy.c | 111 ++++++++++++++++++++++++++++++++------------------------ 1 file changed, 63 insertions(+), 48 deletions(-) f1b39afe3e55 mm/mpol: Introduce vma_put_policy() mm/mempolicy.c | 5 +++++ mm/mmap.c | 8 ++++---- 2 files changed, 9 insertions(+), 4 deletions(-) 9fc52f506a4e mm/mpol: Introduce vma_dup_policy() mm/mempolicy.c | 11 +++++++++++ mm/mmap.c | 17 +++++------------ 2 files changed, 16 insertions(+), 12 deletions(-) 6494a5f2cb89 mm/mpol: Simplify do_mbind() mm/mempolicy.c | 73 +++++++++++++++++++++++++++++--------------------------- 1 file changed, 38 insertions(+), 35 deletions(-) 65699050e8aa mm: Handle misplaced anon pages mm/memory.c | 17 +++++++++++++++++ mm/swapfile.c | 13 +++++++++++++ 2 files changed, 30 insertions(+) 4783af477d3d mm: Migrate misplaced page mm/mempolicy.c | 19 +++++++++ mm/migrate.c | 130 +++++++++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 148 insertions(+), 1 deletion(-) 147c5c460202 mm/mpol: Check for misplaced page mm/mempolicy.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) 84f1e3478238 mm/mpol: Add MPOL_MF_NOOP mm/mempolicy.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) 68d9661d42bf mm/mpol: Add MPOL_MF_LAZY ... mm/mempolicy.c | 20 +++++++----- mm/migrate.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-- mm/rmap.c | 6 ++-- 3 files changed, 109 insertions(+), 13 deletions(-) 03ed7b538ca0 mm/mpol: Make MPOL_LOCAL a real policy mm/mempolicy.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) e975d6ac08f3 mm/mpol: Remove NUMA_INTERLEAVE_HIT mm/mempolicy.c | 68 +++++++++++++++++--------------------------------------- 1 file changed, 21 insertions(+), 47 deletions(-) 8c41549ed1b3 mm/mpol: Re-implement check_*_range() using walk_page_range() mm/mempolicy.c | 141 ++++++++++++++++++-------------------------------------- 1 file changed, 45 insertions(+), 96 deletions(-) 2ab41dd59922 mm: Optimize put_mems_allowed() usage mm/filemap.c | 4 ++-- mm/hugetlb.c | 4 ++-- mm/mempolicy.c | 14 +++++++------- mm/page_alloc.c | 8 ++++---- mm/slab.c | 4 ++-- mm/slub.c | 16 +++------------- 6 files changed, 20 insertions(+), 30 deletions(-) These are mostly lazy migration facility enablers. On a second note, should we internalize MPOL_MF_LAZY as well, to not expose it to user-space? Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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