From: Hugh Dickins <hughd@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>,
David Hildenbrand <david@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Yang Shi <shy828301@gmail.com>, Peter Xu <peterx@redhat.com>,
Song Liu <song@kernel.org>,
sparclinux@vger.kernel.org,
Alexander Gordeev <agordeev@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Will Deacon <will@kernel.org>,
linux-s390@vger.kernel.org, Yu Zhao <yuzhao@google.com>,
Ira Weiny <ira.weiny@intel.com>,
Alistair Popple <apopple@nvidia.com>,
Russell King <linux@armlinux.org.uk>,
Matthew Wilcox <willy@infradead.org>,
Steven Price <steven.price@arm.com>,
Christoph Hellwig <hch@infradead.org>,
Jason Gunthorpe <jgg@ziepe.ca>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Axel Rasmussen <axelrasmussen@google.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Thomas Hellstrom <thomas.hellstrom@linux.intel.com>,
Ralph Campbell <rcampbell@nvidia.com>,
Pasha Tatashin <pasha.tatashin@soleen.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Heiko Ca rstens <hca@linux.ibm.com>,
Qi Zheng <zhengqi.arch@bytedance.com>,
Suren Baghdasaryan <surenb@google.com>,
linux-arm-kernel@lists.infradead.org,
SeongJae Park <sj@kernel.org>, Jann Horn <jannh@google.com>,
linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Naoya Horiguchi <naoya.horiguchi@nec.com>,
linux-kernel@vger.kernel.org, Minchan Kim <minchan@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Mel Gorman <mgorman@techsingularity.net>,
"David S. Miller" <davem@davemloft.net>,
Zack Rusin <zackr@vmware.com>,
Mike Kravetz <mike.kravetz@oracle.com>
Subject: [PATCH 06/12] sparc: add pte_free_defer() for pgtables sharing page
Date: Sun, 28 May 2023 23:21:27 -0700 (PDT) [thread overview]
Message-ID: <f8d84fb8-eb9-6649-7137-715c6010468c@google.com> (raw)
In-Reply-To: <35e983f5-7ed3-b310-d949-9ae8b130cdab@google.com>
Add sparc-specific pte_free_defer(), to call pte_free() via call_rcu().
pte_free_defer() will be called inside khugepaged's retract_page_tables()
loop, where allocating extra memory cannot be relied upon. This precedes
the generic version to avoid build breakage from incompatible pgtable_t.
Signed-off-by: Hugh Dickins <hughd@google.com>
---
arch/sparc/include/asm/pgalloc_64.h | 4 ++++
arch/sparc/mm/init_64.c | 16 ++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/arch/sparc/include/asm/pgalloc_64.h b/arch/sparc/include/asm/pgalloc_64.h
index 7b5561d17ab1..caa7632be4c2 100644
--- a/arch/sparc/include/asm/pgalloc_64.h
+++ b/arch/sparc/include/asm/pgalloc_64.h
@@ -65,6 +65,10 @@ pgtable_t pte_alloc_one(struct mm_struct *mm);
void pte_free_kernel(struct mm_struct *mm, pte_t *pte);
void pte_free(struct mm_struct *mm, pgtable_t ptepage);
+/* arch use pte_free_defer() implementation in arch/sparc/mm/init_64.c */
+#define pte_free_defer pte_free_defer
+void pte_free_defer(struct mm_struct *mm, pgtable_t pgtable);
+
#define pmd_populate_kernel(MM, PMD, PTE) pmd_set(MM, PMD, PTE)
#define pmd_populate(MM, PMD, PTE) pmd_set(MM, PMD, PTE)
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 04f9db0c3111..b7c6aa085ef6 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2930,6 +2930,22 @@ void pgtable_free(void *table, bool is_page)
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+static void pte_free_now(struct rcu_head *head)
+{
+ struct page *page;
+
+ page = container_of(head, struct page, rcu_head);
+ __pte_free((pgtable_t)page_to_virt(page));
+}
+
+void pte_free_defer(struct mm_struct *mm, pgtable_t pgtable)
+{
+ struct page *page;
+
+ page = virt_to_page(pgtable);
+ call_rcu(&page->rcu_head, pte_free_now);
+}
+
void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
pmd_t *pmd)
{
--
2.35.3
next prev parent reply other threads:[~2023-05-29 6:22 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-29 6:11 [PATCH 00/12] mm: free retracted page table by RCU Hugh Dickins
2023-05-29 6:14 ` [PATCH 01/12] mm/pgtable: add rcu_read_lock() and rcu_read_unlock()s Hugh Dickins
2023-05-31 17:06 ` Jann Horn
2023-06-02 2:50 ` Hugh Dickins
2023-06-02 14:21 ` Jann Horn
2023-05-29 6:16 ` [PATCH 02/12] mm/pgtable: add PAE safety to __pte_offset_map() Hugh Dickins
2023-05-29 13:56 ` Matthew Wilcox
[not found] ` <ZHeg3oRljRn6wlLX@ziepe.ca>
2023-06-02 5:35 ` Hugh Dickins
2023-05-29 6:17 ` [PATCH 03/12] arm: adjust_pte() use pte_offset_map_nolock() Hugh Dickins
2023-05-29 6:18 ` [PATCH 04/12] powerpc: assert_pte_locked() " Hugh Dickins
2023-05-29 6:20 ` [PATCH 05/12] powerpc: add pte_free_defer() for pgtables sharing page Hugh Dickins
2023-05-29 14:02 ` Matthew Wilcox
2023-05-29 14:36 ` Hugh Dickins
2023-06-01 13:57 ` Gerald Schaefer
2023-06-02 6:38 ` Hugh Dickins
2023-06-02 14:20 ` Jason Gunthorpe
2023-06-06 3:40 ` Hugh Dickins
2023-06-06 18:23 ` Jason Gunthorpe
2023-06-06 19:03 ` Peter Xu
2023-06-06 19:08 ` Jason Gunthorpe
2023-06-07 3:49 ` Hugh Dickins
2023-05-29 6:21 ` Hugh Dickins [this message]
2023-06-06 3:46 ` [PATCH 06/12] sparc: " Hugh Dickins
2023-05-29 6:22 ` [PATCH 07/12] s390: add pte_free_defer(), with use of mmdrop_async() Hugh Dickins
2023-06-06 5:11 ` Hugh Dickins
2023-06-06 18:39 ` Jason Gunthorpe
2023-06-08 2:46 ` Hugh Dickins
2023-06-06 19:40 ` Gerald Schaefer
2023-06-08 3:35 ` Hugh Dickins
2023-06-08 13:58 ` Jason Gunthorpe
2023-06-08 15:47 ` Gerald Schaefer
2023-05-29 6:23 ` [PATCH 08/12] mm/pgtable: add pte_free_defer() for pgtable as page Hugh Dickins
2023-06-01 13:31 ` Jann Horn
[not found] ` <ZHekpAKJ05cr/GLl@ziepe.ca>
2023-06-02 6:03 ` Hugh Dickins
2023-06-02 12:15 ` Jason Gunthorpe
2023-05-29 6:25 ` [PATCH 09/12] mm/khugepaged: retract_page_tables() without mmap or vma lock Hugh Dickins
2023-05-29 23:26 ` Peter Xu
2023-05-31 0:38 ` Hugh Dickins
2023-05-31 15:34 ` Jann Horn
[not found] ` <ZHe0A079X9B8jWlH@x1n>
2023-05-31 22:18 ` Jann Horn
2023-06-01 14:06 ` Jason Gunthorpe
2023-06-06 6:18 ` Hugh Dickins
2023-05-29 6:26 ` [PATCH 10/12] mm/khugepaged: collapse_pte_mapped_thp() with mmap_read_lock() Hugh Dickins
2023-05-31 17:25 ` Jann Horn
2023-06-02 5:11 ` Hugh Dickins
2023-05-29 6:28 ` [PATCH 11/12] mm/khugepaged: delete khugepaged_collapse_pte_mapped_thps() Hugh Dickins
2023-05-29 6:30 ` [PATCH 12/12] mm: delete mmap_write_trylock() and vma_try_start_write() Hugh Dickins
[not found] ` <CAG48ez0pCqfRdVSnJz7EKtNvMR65=zJgVB-72nTdrNuhtJNX2Q@mail.gmail.com>
2023-06-02 4:37 ` [PATCH 00/12] mm: free retracted page table by RCU Hugh Dickins
2023-06-02 15:26 ` Jann Horn
2023-06-06 6:28 ` Hugh Dickins
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f8d84fb8-eb9-6649-7137-715c6010468c@google.com \
--to=hughd@google.com \
--cc=agordeev@linux.ibm.com \
--cc=akpm@linux-foundation.org \
--cc=aneesh.kumar@linux.ibm.com \
--cc=anshuman.khandual@arm.com \
--cc=apopple@nvidia.com \
--cc=axelrasmussen@google.com \
--cc=borntraeger@linux.ibm.com \
--cc=davem@davemloft.net \
--cc=david@redhat.com \
--cc=hca@linux.ibm.com \
--cc=hch@infradead.org \
--cc=imbrenda@linux.ibm.com \
--cc=ira.weiny@intel.com \
--cc=jannh@google.com \
--cc=jgg@ziepe.ca \
--cc=kirill.shutemov@linux.intel.com \
--cc=linmiaohe@huawei.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mgorman@techsingularity.net \
--cc=mike.kravetz@oracle.com \
--cc=minchan@kernel.org \
--cc=naoya.horiguchi@nec.com \
--cc=pasha.tatashin@soleen.com \
--cc=peterx@redhat.com \
--cc=peterz@infradead.org \
--cc=rcampbell@nvidia.com \
--cc=rppt@kernel.org \
--cc=shy828301@gmail.com \
--cc=sj@kernel.org \
--cc=song@kernel.org \
--cc=sparclinux@vger.kernel.org \
--cc=steven.price@arm.com \
--cc=surenb@google.com \
--cc=thomas.hellstrom@linux.intel.com \
--cc=will@kernel.org \
--cc=willy@infradead.org \
--cc=yuzhao@google.com \
--cc=zackr@vmware.com \
--cc=zhengqi.arch@bytedance.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).