From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: [PATCH 12/19] mm: Pass a sleep state to put_and_wait_on_page_locked
Date: Thu, 29 Oct 2020 19:33:58 +0000 [thread overview]
Message-ID: <20201029193405.29125-13-willy@infradead.org> (raw)
In-Reply-To: <20201029193405.29125-1-willy@infradead.org>
This is prep work for the next patch, but I think at least one of the
current callers would prefer a killable sleep to an uninterruptible one.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
include/linux/pagemap.h | 3 +--
mm/filemap.c | 7 +++++--
mm/huge_memory.c | 4 ++--
mm/migrate.c | 4 ++--
4 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index bb6692001028..b5baaf1347e2 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -699,8 +699,7 @@ static inline int wait_on_page_locked_killable(struct page *page)
return wait_on_page_bit_killable(compound_head(page), PG_locked);
}
-extern void put_and_wait_on_page_locked(struct page *page);
-
+int put_and_wait_on_page_locked(struct page *page, int state);
void wait_on_page_writeback(struct page *page);
extern void end_page_writeback(struct page *page);
void wait_for_stable_page(struct page *page);
diff --git a/mm/filemap.c b/mm/filemap.c
index 91145e33635d..215729048cbd 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1369,20 +1369,23 @@ static int wait_on_page_locked_async(struct page *page,
/**
* put_and_wait_on_page_locked - Drop a reference and wait for it to be unlocked
* @page: The page to wait for.
+ * @state: The sleep state (TASK_KILLABLE, TASK_UNINTERRUPTIBLE, etc).
*
* The caller should hold a reference on @page. They expect the page to
* become unlocked relatively soon, but do not wish to hold up migration
* (for example) by holding the reference while waiting for the page to
* come unlocked. After this function returns, the caller should not
* dereference @page.
+ *
+ * Return: 0 if the page was unlocked or -EINTR if interrupted by a signal.
*/
-void put_and_wait_on_page_locked(struct page *page)
+int put_and_wait_on_page_locked(struct page *page, int state)
{
wait_queue_head_t *q;
page = compound_head(page);
q = page_waitqueue(page);
- wait_on_page_bit_common(q, page, PG_locked, TASK_UNINTERRUPTIBLE, DROP);
+ return wait_on_page_bit_common(q, page, PG_locked, state, DROP);
}
/**
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 03374ec61b45..580afce93d4a 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1432,7 +1432,7 @@ vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t pmd)
if (!get_page_unless_zero(page))
goto out_unlock;
spin_unlock(vmf->ptl);
- put_and_wait_on_page_locked(page);
+ put_and_wait_on_page_locked(page, TASK_UNINTERRUPTIBLE);
goto out;
}
@@ -1468,7 +1468,7 @@ vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t pmd)
if (!get_page_unless_zero(page))
goto out_unlock;
spin_unlock(vmf->ptl);
- put_and_wait_on_page_locked(page);
+ put_and_wait_on_page_locked(page, TASK_UNINTERRUPTIBLE);
goto out;
}
diff --git a/mm/migrate.c b/mm/migrate.c
index 39663dfbc273..a50bbb0e029b 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -335,7 +335,7 @@ void __migration_entry_wait(struct mm_struct *mm, pte_t *ptep,
if (!get_page_unless_zero(page))
goto out;
pte_unmap_unlock(ptep, ptl);
- put_and_wait_on_page_locked(page);
+ put_and_wait_on_page_locked(page, TASK_UNINTERRUPTIBLE);
return;
out:
pte_unmap_unlock(ptep, ptl);
@@ -369,7 +369,7 @@ void pmd_migration_entry_wait(struct mm_struct *mm, pmd_t *pmd)
if (!get_page_unless_zero(page))
goto unlock;
spin_unlock(ptl);
- put_and_wait_on_page_locked(page);
+ put_and_wait_on_page_locked(page, TASK_UNINTERRUPTIBLE);
return;
unlock:
spin_unlock(ptl);
--
2.28.0
next prev parent reply other threads:[~2020-10-29 19:34 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 19:33 [PATCH 00/19] Transparent Hugepages for non-tmpfs filesystems Matthew Wilcox (Oracle)
2020-10-29 19:33 ` [PATCH 01/19] XArray: Expose xas_destroy Matthew Wilcox (Oracle)
2020-10-29 20:33 ` Zi Yan
2020-10-29 19:33 ` [PATCH 02/19] mm: Use multi-index entries in the page cache Matthew Wilcox (Oracle)
2020-10-29 20:49 ` Zi Yan
2020-10-29 21:54 ` Matthew Wilcox
2020-10-30 14:48 ` Zi Yan
2020-11-03 14:04 ` Kirill A. Shutemov
2020-10-29 19:33 ` [PATCH 03/19] mm: Support arbitrary THP sizes Matthew Wilcox (Oracle)
2020-10-29 20:50 ` Zi Yan
2020-10-29 19:33 ` [PATCH 04/19] mm: Change NR_FILE_THPS to account in base pages Matthew Wilcox (Oracle)
2020-10-29 19:33 ` [PATCH 05/19] mm/filemap: Rename generic_file_buffered_read subfunctions Matthew Wilcox (Oracle)
2020-10-30 0:04 ` Kent Overstreet
2020-10-30 8:56 ` Christoph Hellwig
2020-11-03 14:16 ` Kirill A. Shutemov
2020-11-03 14:40 ` Matthew Wilcox
2020-11-03 15:02 ` Kirill A. Shutemov
2020-10-29 19:33 ` [PATCH 06/19] mm/filemap: Change calling convention for gfbr_ functions Matthew Wilcox (Oracle)
2020-10-30 0:05 ` Kent Overstreet
2020-10-29 19:33 ` [PATCH 07/19] mm/filemap: Use head pages in generic_file_buffered_read Matthew Wilcox (Oracle)
2020-10-30 0:19 ` Kent Overstreet
2020-10-30 1:03 ` Matthew Wilcox
2020-10-29 19:33 ` [PATCH 08/19] mm/filemap: Add __page_cache_alloc_order Matthew Wilcox (Oracle)
2020-10-29 19:33 ` [PATCH 09/19] mm/filemap: Allow THPs to be added to the page cache Matthew Wilcox (Oracle)
2020-10-29 19:33 ` [PATCH 10/19] mm/vmscan: Optimise shrink_page_list for smaller THPs Matthew Wilcox (Oracle)
2020-10-29 19:33 ` [PATCH 11/19] mm/filemap: Allow PageReadahead to be set on head pages Matthew Wilcox (Oracle)
2020-10-29 19:33 ` Matthew Wilcox (Oracle) [this message]
2020-10-29 19:33 ` [PATCH 13/19] mm/filemap: Support readpage splitting a page Matthew Wilcox (Oracle)
2020-10-29 19:34 ` [PATCH 14/19] mm/filemap: Inline __wait_on_page_locked_async into caller Matthew Wilcox (Oracle)
2020-10-29 19:34 ` [PATCH 15/19] mm/readahead: Add THP readahead Matthew Wilcox (Oracle)
2020-10-29 19:34 ` [PATCH 16/19] mm/readahead: Align THP mappings for non-DAX Matthew Wilcox (Oracle)
2020-10-29 19:34 ` [PATCH 17/19] mm/readahead: Switch to page_cache_ra_order Matthew Wilcox (Oracle)
2020-10-29 19:34 ` [PATCH 18/19] mm/filemap: Support VM_HUGEPAGE for file mappings Matthew Wilcox (Oracle)
2020-10-29 19:34 ` [PATCH 19/19] selftests/vm/transhuge-stress: Support file-backed THPs Matthew Wilcox (Oracle)
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