From: Miaohe Lin <linmiaohe@huawei.com>
To: Mike Kravetz <mike.kravetz@oracle.com>, <linux-mm@kvack.org>,
<linux-kernel@vger.kernel.org>
Cc: Roman Gushchin <guro@fb.com>, Michal Hocko <mhocko@suse.com>,
Shakeel Butt <shakeelb@google.com>,
Oscar Salvador <osalvador@suse.de>,
David Hildenbrand <david@redhat.com>,
Muchun Song <songmuchun@bytedance.com>,
David Rientjes <rientjes@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Matthew Wilcox <willy@infradead.org>,
HORIGUCHI NAOYA <naoya.horiguchi@nec.com>,
"Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
Waiman Long <longman@redhat.com>, Peter Xu <peterx@redhat.com>,
Mina Almasry <almasrymina@google.com>,
"Hillf Danton" <hdanton@sina.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 0/8] make hugetlb put_page safe for all calling contexts
Date: Fri, 26 Mar 2021 09:42:36 +0800 [thread overview]
Message-ID: <7c74ca0d-59fc-9dc2-6e4c-4357ad76649f@huawei.com> (raw)
In-Reply-To: <20210325002835.216118-1-mike.kravetz@oracle.com>
Hi:
On 2021/3/25 8:28, Mike Kravetz wrote:
> This effort is the result a recent bug report [1]. In subsequent
> discussions [2], it was deemed necessary to properly fix the hugetlb
Many thanks for the effort. I have read the discussions and it is pretty long.
Maybe it would be helpful if you give a brief summary here?
> put_page path (free_huge_page). This RFC provides a possible way to
trival: Not RFC here.
> address the issue. Comments are welcome/encouraged as several attempts
> at this have been made in the past.
> > This series is based on v5.12-rc3-mmotm-2021-03-17-22-24. At a high
> level, the series provides:
> - Patches 1 & 2 from Roman Gushchin provide cma_release_nowait()
trival: missing description of the Patches 3 ?
> - Patches 4, 5 & 6 are aimed at reducing lock hold times. To be clear
> the goal is to eliminate single lock hold times of a long duration.
> Overall lock hold time is not addressed.
> - Patch 7 makes hugetlb_lock and subpool lock IRQ safe. It also reverts
> the code which defers calls to a workqueue if !in_task.
> - Patch 8 adds some lockdep_assert_held() calls
>
> [1] https://lore.kernel.org/linux-mm/000000000000f1c03b05bc43aadc@google.com/
> [2] http://lkml.kernel.org/r/20210311021321.127500-1-mike.kravetz@oracle.com
>
> RFC -> v1
> - Add Roman's cma_release_nowait() patches. This eliminated the need
> to do a workqueue handoff in hugetlb code.
> - Use Michal's suggestion to batch pages for freeing. This eliminated
> the need to recalculate loop control variables when dropping the lock.
> - Added lockdep_assert_held() calls
> - Rebased to v5.12-rc3-mmotm-2021-03-17-22-24
>
> Mike Kravetz (6):
> hugetlb: add per-hstate mutex to synchronize user adjustments
> hugetlb: create remove_hugetlb_page() to separate functionality
> hugetlb: call update_and_free_page without hugetlb_lock
> hugetlb: change free_pool_huge_page to remove_pool_huge_page
> hugetlb: make free_huge_page irq safe
> hugetlb: add lockdep_assert_held() calls for hugetlb_lock
>
> Roman Gushchin (2):
> mm: cma: introduce cma_release_nowait()
> mm: hugetlb: don't drop hugetlb_lock around cma_release() call
>
> include/linux/cma.h | 2 +
> include/linux/hugetlb.h | 1 +
> mm/cma.c | 93 +++++++++++
> mm/cma.h | 5 +
> mm/hugetlb.c | 354 +++++++++++++++++++++-------------------
> mm/hugetlb_cgroup.c | 8 +-
> 6 files changed, 294 insertions(+), 169 deletions(-)
>
next prev parent reply other threads:[~2021-03-26 1:43 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 0:28 [PATCH 0/8] make hugetlb put_page safe for all calling contexts Mike Kravetz
2021-03-25 0:28 ` [PATCH 1/8] mm: cma: introduce cma_release_nowait() Mike Kravetz
2021-03-25 9:39 ` Oscar Salvador
2021-03-25 9:45 ` Michal Hocko
2021-03-25 9:54 ` Oscar Salvador
2021-03-25 10:10 ` Michal Hocko
2021-03-25 10:11 ` Michal Hocko
2021-03-25 10:13 ` David Hildenbrand
2021-03-25 10:17 ` Oscar Salvador
2021-03-25 10:24 ` Michal Hocko
2021-03-25 9:56 ` David Hildenbrand
2021-03-25 10:22 ` Michal Hocko
2021-03-25 16:56 ` Mike Kravetz
2021-03-25 17:15 ` David Hildenbrand
2021-03-25 20:12 ` Minchan Kim
2021-03-25 23:19 ` Roman Gushchin
2021-03-25 23:49 ` Mike Kravetz
2021-03-26 21:32 ` Mike Kravetz
2021-03-29 7:46 ` Michal Hocko
2021-03-29 22:27 ` Mike Kravetz
2021-03-25 0:28 ` [PATCH 2/8] mm: hugetlb: don't drop hugetlb_lock around cma_release() call Mike Kravetz
2021-03-25 0:28 ` [PATCH 3/8] hugetlb: add per-hstate mutex to synchronize user adjustments Mike Kravetz
2021-03-25 10:47 ` Michal Hocko
2021-03-25 12:29 ` Oscar Salvador
2021-03-26 1:52 ` Miaohe Lin
2021-03-25 0:28 ` [PATCH 4/8] hugetlb: create remove_hugetlb_page() to separate functionality Mike Kravetz
2021-03-25 10:49 ` Michal Hocko
2021-03-26 2:10 ` Miaohe Lin
2021-03-26 19:57 ` Mike Kravetz
2021-03-27 1:40 ` Miaohe Lin
2021-03-27 6:36 ` [External] " Muchun Song
2021-03-25 0:28 ` [PATCH 5/8] hugetlb: call update_and_free_page without hugetlb_lock Mike Kravetz
2021-03-25 10:55 ` Michal Hocko
2021-03-25 17:12 ` Mike Kravetz
2021-03-25 19:39 ` Michal Hocko
2021-03-25 20:33 ` Mike Kravetz
2021-03-27 6:54 ` [External] " Muchun Song
2021-03-28 21:40 ` Mike Kravetz
2021-03-25 0:28 ` [PATCH 6/8] hugetlb: change free_pool_huge_page to remove_pool_huge_page Mike Kravetz
2021-03-25 11:06 ` Michal Hocko
2021-03-25 17:29 ` Mike Kravetz
2021-03-25 0:28 ` [PATCH 7/8] hugetlb: make free_huge_page irq safe Mike Kravetz
2021-03-25 11:21 ` Michal Hocko
2021-03-25 17:32 ` Mike Kravetz
2021-03-27 7:06 ` [External] " Muchun Song
2021-03-29 7:49 ` Michal Hocko
2021-03-29 22:44 ` Mike Kravetz
2021-03-25 0:28 ` [PATCH 8/8] hugetlb: add lockdep_assert_held() calls for hugetlb_lock Mike Kravetz
2021-03-25 11:22 ` Michal Hocko
2021-03-26 2:12 ` Miaohe Lin
2021-03-27 8:14 ` [External] " Muchun Song
2021-03-26 1:42 ` Miaohe Lin [this message]
2021-03-26 20:00 ` [PATCH 0/8] make hugetlb put_page safe for all calling contexts Mike Kravetz
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