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authorLinus Torvalds <torvalds@linux-foundation.org>2021-09-03 10:08:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-03 10:08:28 -0700
commit14726903c835101cd8d0a703b609305094350d61 (patch)
tree5cdcf5d2f06ca14be76efd33a4de0e3b28a70de0 /mm/truncate.c
parenta9c9a6f741cdaa2fa9ba24a790db8d07295761e3 (diff)
parentd5fffc5aff269717a035baa087630adca612a6c4 (diff)
downloadlinux-14726903c835101cd8d0a703b609305094350d61.tar.bz2
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton: "173 patches. Subsystems affected by this series: ia64, ocfs2, block, and mm (debug, pagecache, gup, swap, shmem, memcg, selftests, pagemap, mremap, bootmem, sparsemem, vmalloc, kasan, pagealloc, memory-failure, hugetlb, userfaultfd, vmscan, compaction, mempolicy, memblock, oom-kill, migration, ksm, percpu, vmstat, and madvise)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (173 commits) mm/madvise: add MADV_WILLNEED to process_madvise() mm/vmstat: remove unneeded return value mm/vmstat: simplify the array size calculation mm/vmstat: correct some wrong comments mm/percpu,c: remove obsolete comments of pcpu_chunk_populated() selftests: vm: add COW time test for KSM pages selftests: vm: add KSM merging time test mm: KSM: fix data type selftests: vm: add KSM merging across nodes test selftests: vm: add KSM zero page merging test selftests: vm: add KSM unmerge test selftests: vm: add KSM merge test mm/migrate: correct kernel-doc notation mm: wire up syscall process_mrelease mm: introduce process_mrelease system call memblock: make memblock_find_in_range method private mm/mempolicy.c: use in_task() in mempolicy_slab_node() mm/mempolicy: unify the create() func for bind/interleave/prefer-many policies mm/mempolicy: advertise new MPOL_PREFERRED_MANY mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY ...
Diffstat (limited to 'mm/truncate.c')
-rw-r--r--mm/truncate.c28
1 files changed, 13 insertions, 15 deletions
diff --git a/mm/truncate.c b/mm/truncate.c
index 44ad5e515140..714eaf19821d 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -484,8 +484,9 @@ static unsigned long __invalidate_mapping_pages(struct address_space *mapping,
index = indices[i];
if (xa_is_value(page)) {
- invalidate_exceptional_entry(mapping, index,
- page);
+ count += invalidate_exceptional_entry(mapping,
+ index,
+ page);
continue;
}
index += thp_nr_pages(page) - 1;
@@ -513,19 +514,18 @@ static unsigned long __invalidate_mapping_pages(struct address_space *mapping,
}
/**
- * invalidate_mapping_pages - Invalidate all the unlocked pages of one inode
- * @mapping: the address_space which holds the pages to invalidate
+ * invalidate_mapping_pages - Invalidate all clean, unlocked cache of one inode
+ * @mapping: the address_space which holds the cache to invalidate
* @start: the offset 'from' which to invalidate
* @end: the offset 'to' which to invalidate (inclusive)
*
- * This function only removes the unlocked pages, if you want to
- * remove all the pages of one inode, you must call truncate_inode_pages.
+ * This function removes pages that are clean, unmapped and unlocked,
+ * as well as shadow entries. It will not block on IO activity.
*
- * invalidate_mapping_pages() will not block on IO activity. It will not
- * invalidate pages which are dirty, locked, under writeback or mapped into
- * pagetables.
+ * If you want to remove all the pages of one inode, regardless of
+ * their use and writeback state, use truncate_inode_pages().
*
- * Return: the number of the pages that were invalidated
+ * Return: the number of the cache entries that were invalidated
*/
unsigned long invalidate_mapping_pages(struct address_space *mapping,
pgoff_t start, pgoff_t end)
@@ -561,21 +561,19 @@ void invalidate_mapping_pagevec(struct address_space *mapping,
static int
invalidate_complete_page2(struct address_space *mapping, struct page *page)
{
- unsigned long flags;
-
if (page->mapping != mapping)
return 0;
if (page_has_private(page) && !try_to_release_page(page, GFP_KERNEL))
return 0;
- xa_lock_irqsave(&mapping->i_pages, flags);
+ xa_lock_irq(&mapping->i_pages);
if (PageDirty(page))
goto failed;
BUG_ON(page_has_private(page));
__delete_from_page_cache(page, NULL);
- xa_unlock_irqrestore(&mapping->i_pages, flags);
+ xa_unlock_irq(&mapping->i_pages);
if (mapping->a_ops->freepage)
mapping->a_ops->freepage(page);
@@ -583,7 +581,7 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
put_page(page); /* pagecache ref */
return 1;
failed:
- xa_unlock_irqrestore(&mapping->i_pages, flags);
+ xa_unlock_irq(&mapping->i_pages);
return 0;
}