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From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, dchinner@redhat.com,
	hannes@cmpxchg.org, hch@lst.de, hughd@google.com, jack@suse.cz,
	kirill.shutemov@linux.intel.com, linux-mm@kvack.org,
	mm-commits@vger.kernel.org, torvalds@linux-foundation.org,
	william.kucharski@oracle.com, willy@infradead.org,
	yang.shi@linux.alibaba.com
Subject: [patch 011/118] mm: add an 'end' parameter to pagevec_lookup_entries
Date: Thu, 25 Feb 2021 17:16:03 -0800
Message-ID: <20210226011603.dLz9paf7G%akpm@linux-foundation.org> (raw)
In-Reply-To: <20210225171452.713967e96554bb6a53e44a19@linux-foundation.org>

From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: mm: add an 'end' parameter to pagevec_lookup_entries

Simplifies the callers and uses the existing functionality in
find_get_entries().  We can also drop the final argument of
truncate_exceptional_pvec_entries() and simplify the logic in that
function.

Link: https://lkml.kernel.org/r/20201112212641.27837-12-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Yang Shi <yang.shi@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/pagevec.h |    5 +---
 mm/swap.c               |    8 +++----
 mm/truncate.c           |   41 +++++++++-----------------------------
 3 files changed, 16 insertions(+), 38 deletions(-)

--- a/include/linux/pagevec.h~mm-add-an-end-parameter-to-pagevec_lookup_entries
+++ a/include/linux/pagevec.h
@@ -26,9 +26,8 @@ struct pagevec {
 void __pagevec_release(struct pagevec *pvec);
 void __pagevec_lru_add(struct pagevec *pvec);
 unsigned pagevec_lookup_entries(struct pagevec *pvec,
-				struct address_space *mapping,
-				pgoff_t start, unsigned nr_entries,
-				pgoff_t *indices);
+		struct address_space *mapping, pgoff_t start, pgoff_t end,
+		unsigned nr_entries, pgoff_t *indices);
 void pagevec_remove_exceptionals(struct pagevec *pvec);
 unsigned pagevec_lookup_range(struct pagevec *pvec,
 			      struct address_space *mapping,
--- a/mm/swap.c~mm-add-an-end-parameter-to-pagevec_lookup_entries
+++ a/mm/swap.c
@@ -1022,6 +1022,7 @@ void __pagevec_lru_add(struct pagevec *p
  * @pvec:	Where the resulting entries are placed
  * @mapping:	The address_space to search
  * @start:	The starting entry index
+ * @end:	The highest index to return (inclusive).
  * @nr_entries:	The maximum number of pages
  * @indices:	The cache indices corresponding to the entries in @pvec
  *
@@ -1042,11 +1043,10 @@ void __pagevec_lru_add(struct pagevec *p
  * found.
  */
 unsigned pagevec_lookup_entries(struct pagevec *pvec,
-				struct address_space *mapping,
-				pgoff_t start, unsigned nr_entries,
-				pgoff_t *indices)
+		struct address_space *mapping, pgoff_t start, pgoff_t end,
+		unsigned nr_entries, pgoff_t *indices)
 {
-	pvec->nr = find_get_entries(mapping, start, ULONG_MAX, nr_entries,
+	pvec->nr = find_get_entries(mapping, start, end, nr_entries,
 				    pvec->pages, indices);
 	return pagevec_count(pvec);
 }
--- a/mm/truncate.c~mm-add-an-end-parameter-to-pagevec_lookup_entries
+++ a/mm/truncate.c
@@ -57,11 +57,10 @@ static void clear_shadow_entry(struct ad
  * exceptional entries similar to what pagevec_remove_exceptionals does.
  */
 static void truncate_exceptional_pvec_entries(struct address_space *mapping,
-				struct pagevec *pvec, pgoff_t *indices,
-				pgoff_t end)
+				struct pagevec *pvec, pgoff_t *indices)
 {
 	int i, j;
-	bool dax, lock;
+	bool dax;
 
 	/* Handled by shmem itself */
 	if (shmem_mapping(mapping))
@@ -75,8 +74,7 @@ static void truncate_exceptional_pvec_en
 		return;
 
 	dax = dax_mapping(mapping);
-	lock = !dax && indices[j] < end;
-	if (lock)
+	if (!dax)
 		xa_lock_irq(&mapping->i_pages);
 
 	for (i = j; i < pagevec_count(pvec); i++) {
@@ -88,9 +86,6 @@ static void truncate_exceptional_pvec_en
 			continue;
 		}
 
-		if (index >= end)
-			continue;
-
 		if (unlikely(dax)) {
 			dax_delete_mapping_entry(mapping, index);
 			continue;
@@ -99,7 +94,7 @@ static void truncate_exceptional_pvec_en
 		__clear_shadow_entry(mapping, index, page);
 	}
 
-	if (lock)
+	if (!dax)
 		xa_unlock_irq(&mapping->i_pages);
 	pvec->nr = j;
 }
@@ -329,7 +324,7 @@ void truncate_inode_pages_range(struct a
 	while (index < end && find_lock_entries(mapping, index, end - 1,
 			&pvec, indices)) {
 		index = indices[pagevec_count(&pvec) - 1] + 1;
-		truncate_exceptional_pvec_entries(mapping, &pvec, indices, end);
+		truncate_exceptional_pvec_entries(mapping, &pvec, indices);
 		for (i = 0; i < pagevec_count(&pvec); i++)
 			truncate_cleanup_page(mapping, pvec.pages[i]);
 		delete_from_page_cache_batch(mapping, &pvec);
@@ -381,8 +376,8 @@ void truncate_inode_pages_range(struct a
 	index = start;
 	for ( ; ; ) {
 		cond_resched();
-		if (!pagevec_lookup_entries(&pvec, mapping, index,
-			min(end - index, (pgoff_t)PAGEVEC_SIZE), indices)) {
+		if (!pagevec_lookup_entries(&pvec, mapping, index, end - 1,
+				PAGEVEC_SIZE, indices)) {
 			/* If all gone from start onwards, we're done */
 			if (index == start)
 				break;
@@ -390,23 +385,12 @@ void truncate_inode_pages_range(struct a
 			index = start;
 			continue;
 		}
-		if (index == start && indices[0] >= end) {
-			/* All gone out of hole to be punched, we're done */
-			pagevec_remove_exceptionals(&pvec);
-			pagevec_release(&pvec);
-			break;
-		}
 
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
 			/* We rely upon deletion not changing page->index */
 			index = indices[i];
-			if (index >= end) {
-				/* Restart punch to make sure all gone */
-				index = start - 1;
-				break;
-			}
 
 			if (xa_is_value(page))
 				continue;
@@ -417,7 +401,7 @@ void truncate_inode_pages_range(struct a
 			truncate_inode_page(mapping, page);
 			unlock_page(page);
 		}
-		truncate_exceptional_pvec_entries(mapping, &pvec, indices, end);
+		truncate_exceptional_pvec_entries(mapping, &pvec, indices);
 		pagevec_release(&pvec);
 		index++;
 	}
@@ -513,8 +497,6 @@ static unsigned long __invalidate_mappin
 
 			/* We rely upon deletion not changing page->index */
 			index = indices[i];
-			if (index > end)
-				break;
 
 			if (xa_is_value(page)) {
 				invalidate_exceptional_entry(mapping, index,
@@ -656,16 +638,13 @@ int invalidate_inode_pages2_range(struct
 
 	pagevec_init(&pvec);
 	index = start;
-	while (index <= end && pagevec_lookup_entries(&pvec, mapping, index,
-			min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
-			indices)) {
+	while (pagevec_lookup_entries(&pvec, mapping, index, end,
+			PAGEVEC_SIZE, indices)) {
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
 			/* We rely upon deletion not changing page->index */
 			index = indices[i];
-			if (index > end)
-				break;
 
 			if (xa_is_value(page)) {
 				if (!invalidate_exceptional_entry2(mapping,
_

  parent reply index

Thread overview: 123+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-26  1:14 incoming Andrew Morton
2021-02-26  1:15 ` [patch 001/118] mm: make pagecache tagged lookups return only head pages Andrew Morton
2021-02-26  1:15 ` [patch 002/118] mm/shmem: use pagevec_lookup in shmem_unlock_mapping Andrew Morton
2021-02-26  1:15 ` [patch 003/118] mm/swap: optimise get_shadow_from_swap_cache Andrew Morton
2021-02-26  1:15 ` [patch 004/118] mm: add FGP_ENTRY Andrew Morton
2021-02-26  1:15 ` [patch 005/118] mm/filemap: rename find_get_entry to mapping_get_entry Andrew Morton
2021-02-26  1:15 ` [patch 006/118] mm/filemap: add helper for finding pages Andrew Morton
2021-02-26  1:15 ` [patch 007/118] mm/filemap: add mapping_seek_hole_data Andrew Morton
2021-02-26  1:15 ` [patch 008/118] iomap: use mapping_seek_hole_data Andrew Morton
2021-02-26  1:15 ` [patch 009/118] mm: add and use find_lock_entries Andrew Morton
2021-02-26  1:16 ` [patch 010/118] mm: add an 'end' parameter to find_get_entries Andrew Morton
2021-02-26  1:16 ` Andrew Morton [this message]
2021-02-26  1:16 ` [patch 012/118] mm: remove nr_entries parameter from pagevec_lookup_entries Andrew Morton
2021-02-26  1:16 ` [patch 013/118] mm: pass pvec directly to find_get_entries Andrew Morton
2021-02-26  1:16 ` [patch 014/118] mm: remove pagevec_lookup_entries Andrew Morton
2021-02-26  1:16 ` [patch 015/118] mm,thp,shmem: limit shmem THP alloc gfp_mask Andrew Morton
2021-02-26  1:16 ` [patch 016/118] mm,thp,shm: limit gfp mask to no more than specified Andrew Morton
2021-02-26  1:16 ` [patch 017/118] mm,thp,shmem: make khugepaged obey tmpfs mount flags Andrew Morton
2021-02-26  1:16 ` [patch 018/118] mm,shmem,thp: limit shmem THP allocations to requested zones Andrew Morton
2021-02-26  1:16 ` [patch 019/118] mm: cma: allocate cma areas bottom-up Andrew Morton
2021-02-26  1:16 ` [patch 020/118] mm/cma: expose all pages to the buddy if activation of an area fails Andrew Morton
2021-02-26  1:16 ` [patch 021/118] mm/page_alloc: count CMA pages per zone and print them in /proc/zoneinfo Andrew Morton
2021-02-26  1:16 ` [patch 022/118] mm: cma: print region name on failure Andrew Morton
2021-02-26  1:16 ` [patch 023/118] mm: vmstat: fix NOHZ wakeups for node stat changes Andrew Morton
2021-02-26  1:16 ` [patch 024/118] mm: vmstat: add some comments on internal storage of byte items Andrew Morton
2021-02-26  1:16 ` [patch 025/118] mm/vmstat.c: erase latency in vmstat_shepherd Andrew Morton
2021-02-26  1:16 ` [patch 026/118] mm: move pfn_to_online_page() out of line Andrew Morton
2021-02-26  1:17 ` [patch 027/118] mm: teach pfn_to_online_page() to consider subsection validity Andrew Morton
2021-02-26  1:17 ` [patch 028/118] mm: teach pfn_to_online_page() about ZONE_DEVICE section collisions Andrew Morton
2021-02-26  1:17 ` [patch 029/118] mm: fix memory_failure() handling of dax-namespace metadata Andrew Morton
2021-02-26  1:17 ` [patch 030/118] mm/memory_hotplug: rename all existing 'memhp' into 'mhp' Andrew Morton
2021-02-26  1:17 ` [patch 031/118] mm/memory_hotplug: MEMHP_MERGE_RESOURCE -> MHP_MERGE_RESOURCE Andrew Morton
2021-02-26  1:17 ` [patch 032/118] mm/memory_hotplug: use helper function zone_end_pfn() to get end_pfn Andrew Morton
2021-02-26  1:17 ` [patch 033/118] drivers/base/memory: don't store phys_device in memory blocks Andrew Morton
2021-02-26  1:17 ` [patch 034/118] Documentation: sysfs/memory: clarify some memory block device properties Andrew Morton
2021-02-26  1:17 ` [patch 035/118] mm/memory_hotplug: prevalidate the address range being added with platform Andrew Morton
2021-02-26  1:17 ` [patch 036/118] arm64/mm: define arch_get_mappable_range() Andrew Morton
2021-02-26  1:17 ` [patch 037/118] s390/mm: " Andrew Morton
2021-02-26  1:17 ` [patch 038/118] virtio-mem: check against mhp_get_pluggable_range() which memory we can hotplug Andrew Morton
2021-02-26  1:17 ` [patch 039/118] mm/mlock: stop counting mlocked pages when none vma is found Andrew Morton
2021-02-26  1:17 ` [patch 040/118] mm/rmap: correct some obsolete comments of anon_vma Andrew Morton
2021-02-26  1:17 ` [patch 041/118] mm/rmap: remove unneeded semicolon in page_not_mapped() Andrew Morton
2021-02-26  1:17 ` [patch 042/118] mm/rmap: fix obsolete comment in __page_check_anon_rmap() Andrew Morton
2021-02-26  1:18 ` [patch 043/118] mm/rmap: use page_not_mapped in try_to_unmap() Andrew Morton
2021-02-26  1:18 ` [patch 044/118] mm/rmap: correct obsolete comment of page_get_anon_vma() Andrew Morton
2021-02-26  1:18 ` [patch 045/118] mm/rmap: fix potential pte_unmap on an not mapped pte Andrew Morton
2021-02-26  1:18 ` [patch 046/118] mm: zswap: clean up confusing comment Andrew Morton
2021-02-26  1:18 ` [patch 047/118] mm/zswap: add the flag can_sleep_mapped Andrew Morton
2021-02-26  1:18 ` [patch 048/118] mm: set the sleep_mapped to true for zbud and z3fold Andrew Morton
2021-02-26  1:18 ` [patch 049/118] mm/zsmalloc.c: convert to use kmem_cache_zalloc in cache_alloc_zspage() Andrew Morton
2021-02-26  1:18 ` [patch 050/118] zsmalloc: account the number of compacted pages correctly Andrew Morton
2021-02-26  1:18 ` [patch 051/118] mm/zsmalloc.c: use page_private() to access page->private Andrew Morton
2021-02-26  1:18 ` [patch 052/118] mm: page-flags.h: Typo fix (It -> If) Andrew Morton
2021-02-26  1:18 ` [patch 053/118] mm/dmapool: use might_alloc() Andrew Morton
2021-02-26  1:18 ` [patch 054/118] mm/backing-dev.c: " Andrew Morton
2021-02-26  1:18 ` [patch 055/118] mm/early_ioremap.c: use __func__ instead of function name Andrew Morton
2021-02-26  1:18 ` [patch 056/118] mm: add Kernel Electric-Fence infrastructure Andrew Morton
2021-02-26  1:18 ` [patch 057/118] x86, kfence: enable KFENCE for x86 Andrew Morton
2021-02-26  1:19 ` [patch 058/118] arm64, kfence: enable KFENCE for ARM64 Andrew Morton
2021-02-26  1:19 ` [patch 059/118] kfence: use pt_regs to generate stack trace on faults Andrew Morton
2021-02-26  1:19 ` [patch 060/118] mm, kfence: insert KFENCE hooks for SLAB Andrew Morton
2021-02-26  1:19 ` [patch 061/118] mm, kfence: insert KFENCE hooks for SLUB Andrew Morton
2021-02-26  1:19 ` [patch 062/118] kfence, kasan: make KFENCE compatible with KASAN Andrew Morton
2021-02-26  1:19 ` [patch 063/118] kfence, Documentation: add KFENCE documentation Andrew Morton
2021-02-26  1:19 ` [patch 064/118] kfence: add test suite Andrew Morton
2021-02-26  1:19 ` [patch 065/118] MAINTAINERS: add entry for KFENCE Andrew Morton
2021-02-26  1:19 ` [patch 066/118] kfence: report sensitive information based on no_hash_pointers Andrew Morton
2021-02-26  1:19 ` [patch 067/118] tracing: add error_report_end trace point Andrew Morton
2021-02-26 14:03   ` Steven Rostedt
2021-02-26  1:19 ` [patch 068/118] kfence: use error_report_end tracepoint Andrew Morton
2021-02-26  1:19 ` [patch 069/118] kasan: " Andrew Morton
2021-02-26  1:19 ` [patch 070/118] kasan, mm: don't save alloc stacks twice Andrew Morton
2021-02-26  1:19 ` [patch 071/118] kasan, mm: optimize kmalloc poisoning Andrew Morton
2021-02-26  1:20 ` [patch 072/118] kasan: optimize large " Andrew Morton
2021-02-26  1:20 ` [patch 073/118] kasan: clean up setting free info in kasan_slab_free Andrew Morton
2021-02-26  1:20 ` [patch 074/118] kasan: unify large kfree checks Andrew Morton
2021-02-26  1:20 ` [patch 075/118] kasan: rework krealloc tests Andrew Morton
2021-02-26  1:20 ` [patch 076/118] kasan, mm: fail krealloc on freed objects Andrew Morton
2021-02-26  1:20 ` [patch 077/118] kasan, mm: optimize krealloc poisoning Andrew Morton
2021-02-26  1:20 ` [patch 078/118] kasan: ensure poisoning size alignment Andrew Morton
2021-02-26  1:20 ` [patch 079/118] arm64: kasan: simplify and inline MTE functions Andrew Morton
2021-02-26  1:20 ` [patch 080/118] kasan: inline HW_TAGS helper functions Andrew Morton
2021-02-26  1:20 ` [patch 081/118] kasan: clarify that only first bug is reported in HW_TAGS Andrew Morton
2021-02-26  1:20 ` [patch 082/118] alpha: remove CONFIG_EXPERIMENTAL from defconfigs Andrew Morton
2021-02-26  1:20 ` [patch 083/118] proc/wchan: use printk format instead of lookup_symbol_name() Andrew Morton
2021-02-26  1:20 ` [patch 084/118] proc: use kvzalloc for our kernel buffer Andrew Morton
2021-02-26  1:20 ` [patch 085/118] sysctl.c: fix underflow value setting risk in vm_table Andrew Morton
2021-02-26  1:20 ` [patch 086/118] include/linux: remove repeated words Andrew Morton
2021-02-26  1:21 ` [patch 087/118] treewide: Miguel has moved Andrew Morton
2021-02-26  1:21 ` [patch 088/118] groups: use flexible-array member in struct group_info Andrew Morton
2021-02-26  1:21 ` [patch 089/118] groups: simplify struct group_info allocation Andrew Morton
2021-02-26  1:21 ` [patch 090/118] kernel: delete repeated words in comments Andrew Morton
2021-02-26  1:21 ` [patch 091/118] MAINTAINERS: add uapi directories to API/ABI section Andrew Morton
2021-02-27 19:18   ` Michael Kerrisk (man-pages)
2021-02-26  1:21 ` [patch 092/118] lib/genalloc.c: change return type to unsigned long for bitmap_set_ll Andrew Morton
2021-02-26  1:21 ` [patch 093/118] string.h: move fortified functions definitions in a dedicated header Andrew Morton
2021-02-26  1:21 ` [patch 094/118] lib: stackdepot: add support to configure STACK_HASH_SIZE Andrew Morton
2021-02-26  1:21 ` [patch 095/118] lib: stackdepot: add support to disable stack depot Andrew Morton
2021-02-26  1:21 ` [patch 096/118] lib: stackdepot: fix ignoring return value warning Andrew Morton
2021-02-26  1:21 ` [patch 097/118] lib/cmdline: remove an unneeded local variable in next_arg() Andrew Morton
2021-02-26  1:21 ` [patch 098/118] include/linux/bitops.h: spelling s/synomyn/synonym/ Andrew Morton
2021-02-26  1:21 ` [patch 099/118] checkpatch: improve blank line after declaration test Andrew Morton
2021-02-26  1:21 ` [patch 100/118] checkpatch: ignore warning designated initializers using NR_CPUS Andrew Morton
2021-02-26  1:21 ` [patch 101/118] checkpatch: trivial style fixes Andrew Morton
2021-02-26  1:21 ` [patch 102/118] checkpatch: prefer ftrace over function entry/exit printks Andrew Morton
2021-02-26  1:21 ` [patch 103/118] checkpatch: improve TYPECAST_INT_CONSTANT test message Andrew Morton
2021-02-26  1:21 ` [patch 104/118] checkpatch: add warning for avoiding .L prefix symbols in assembly files Andrew Morton
2021-02-26  1:22 ` [patch 105/118] checkpatch: add kmalloc_array_node to unnecessary OOM message check Andrew Morton
2021-02-26  1:22 ` [patch 106/118] checkpatch: don't warn about colon termination in linker scripts Andrew Morton
2021-02-26  1:22 ` [patch 107/118] checkpatch: do not apply "initialise globals to 0" check to BPF progs Andrew Morton
2021-02-26  1:22 ` [patch 108/118] init/version.c: remove Version_<LINUX_VERSION_CODE> symbol Andrew Morton
2021-02-26  1:22 ` [patch 109/118] init: clean up early_param_on_off() macro Andrew Morton
2021-02-26  1:22 ` [patch 110/118] init/Kconfig: fix a typo in CC_VERSION_TEXT help text Andrew Morton
2021-02-26  1:22 ` [patch 111/118] fs/coredump: use kmap_local_page() Andrew Morton
2021-02-26  1:22 ` [patch 112/118] seq_file: document how per-entry resources are managed Andrew Morton
2021-02-26  1:22 ` [patch 113/118] x86: fix seq_file iteration for pat/memtype.c Andrew Morton
2021-02-26  1:22 ` [patch 114/118] scripts/gdb: fix list_for_each Andrew Morton
2021-02-26  1:22 ` [patch 115/118] kgdb: fix to kill breakpoints on initmem after boot Andrew Morton
2021-02-26  1:22 ` [patch 116/118] ubsan: remove overflow checks Andrew Morton
2021-02-26  1:22 ` [patch 117/118] initramfs: panic with memory information Andrew Morton
2021-02-26  1:22 ` [patch 118/118] MIPS: make userspace mapping young by default Andrew Morton
2021-02-26 17:55 ` incoming Linus Torvalds
2021-02-26 19:16   ` incoming Andrew Morton

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