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-rw-r--r--mm/debug.c7
-rw-r--r--mm/filemap.c4
-rw-r--r--mm/gup.c11
-rw-r--r--mm/huge_memory.c19
-rw-r--r--mm/hugetlb.c5
-rw-r--r--mm/internal.h6
-rw-r--r--mm/kasan/kasan_test_c.c2
-rw-r--r--mm/kasan/report.c6
-rw-r--r--mm/memblock.c4
-rw-r--r--mm/memcontrol-v1.h2
-rw-r--r--mm/memory.c18
-rw-r--r--mm/mempolicy.c4
-rw-r--r--mm/migrate.c2
-rw-r--r--mm/mmap.c1
-rw-r--r--mm/page_alloc.c6
-rw-r--r--mm/pgtable-generic.c2
-rw-r--r--mm/readahead.c5
-rw-r--r--mm/shmem.c22
-rw-r--r--mm/slub.c21
-rw-r--r--mm/vma.c7
-rw-r--r--mm/vmalloc.c9
21 files changed, 100 insertions, 63 deletions
diff --git a/mm/debug.c b/mm/debug.c
index aa57d3ffd4ed..95b6ab809c0e 100644
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -124,19 +124,22 @@ static void __dump_page(const struct page *page)
{
struct folio *foliop, folio;
struct page precise;
+ unsigned long head;
unsigned long pfn = page_to_pfn(page);
unsigned long idx, nr_pages = 1;
int loops = 5;
again:
memcpy(&precise, page, sizeof(*page));
- foliop = page_folio(&precise);
- if (foliop == (struct folio *)&precise) {
+ head = precise.compound_head;
+ if ((head & 1) == 0) {
+ foliop = (struct folio *)&precise;
idx = 0;
if (!folio_test_large(foliop))
goto dump;
foliop = (struct folio *)page;
} else {
+ foliop = (struct folio *)(head - 1);
idx = folio_page_idx(foliop, page);
}
diff --git a/mm/filemap.c b/mm/filemap.c
index 7c76a123ba18..f61cf51c2238 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3501,10 +3501,10 @@ static struct folio *next_uptodate_folio(struct xa_state *xas,
continue;
if (xa_is_value(folio))
continue;
- if (folio_test_locked(folio))
- continue;
if (!folio_try_get(folio))
continue;
+ if (folio_test_locked(folio))
+ goto skip;
/* Has the page moved or been split? */
if (unlikely(folio != xas_reload(xas)))
goto skip;
diff --git a/mm/gup.c b/mm/gup.c
index 746070a1d8bf..3b75e631f369 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -52,7 +52,12 @@ static inline void sanity_check_pinned_pages(struct page **pages,
*/
for (; npages; npages--, pages++) {
struct page *page = *pages;
- struct folio *folio = page_folio(page);
+ struct folio *folio;
+
+ if (!page)
+ continue;
+
+ folio = page_folio(page);
if (is_zero_page(page) ||
!folio_test_anon(folio))
@@ -409,6 +414,10 @@ void unpin_user_pages(struct page **pages, unsigned long npages)
sanity_check_pinned_pages(pages, npages);
for (i = 0; i < npages; i += nr) {
+ if (!pages[i]) {
+ nr = 1;
+ continue;
+ }
folio = gup_folio_next(pages, npages, i, &nr);
gup_put_folio(folio, nr, FOLL_PIN);
}
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index ee335d96fc39..e53d83b3e5cf 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1176,11 +1176,12 @@ static struct folio *vma_alloc_anon_folio_pmd(struct vm_area_struct *vma,
folio_throttle_swaprate(folio, gfp);
/*
- * When a folio is not zeroed during allocation (__GFP_ZERO not used),
- * folio_zero_user() is used to make sure that the page corresponding
- * to the faulting address will be hot in the cache after zeroing.
+ * When a folio is not zeroed during allocation (__GFP_ZERO not used)
+ * or user folios require special handling, folio_zero_user() is used to
+ * make sure that the page corresponding to the faulting address will be
+ * hot in the cache after zeroing.
*/
- if (!alloc_zeroed())
+ if (user_alloc_needs_zeroing())
folio_zero_user(folio, addr);
/*
* The memory barrier inside __folio_mark_uptodate makes sure that
@@ -3576,7 +3577,7 @@ int split_huge_page_to_list_to_order(struct page *page, struct list_head *list,
!list_empty(&folio->_deferred_list)) {
ds_queue->split_queue_len--;
if (folio_test_partially_mapped(folio)) {
- __folio_clear_partially_mapped(folio);
+ folio_clear_partially_mapped(folio);
mod_mthp_stat(folio_order(folio),
MTHP_STAT_NR_ANON_PARTIALLY_MAPPED, -1);
}
@@ -3688,7 +3689,7 @@ bool __folio_unqueue_deferred_split(struct folio *folio)
if (!list_empty(&folio->_deferred_list)) {
ds_queue->split_queue_len--;
if (folio_test_partially_mapped(folio)) {
- __folio_clear_partially_mapped(folio);
+ folio_clear_partially_mapped(folio);
mod_mthp_stat(folio_order(folio),
MTHP_STAT_NR_ANON_PARTIALLY_MAPPED, -1);
}
@@ -3732,7 +3733,7 @@ void deferred_split_folio(struct folio *folio, bool partially_mapped)
spin_lock_irqsave(&ds_queue->split_queue_lock, flags);
if (partially_mapped) {
if (!folio_test_partially_mapped(folio)) {
- __folio_set_partially_mapped(folio);
+ folio_set_partially_mapped(folio);
if (folio_test_pmd_mappable(folio))
count_vm_event(THP_DEFERRED_SPLIT_PAGE);
count_mthp_stat(folio_order(folio), MTHP_STAT_SPLIT_DEFERRED);
@@ -3825,7 +3826,7 @@ static unsigned long deferred_split_scan(struct shrinker *shrink,
} else {
/* We lost race with folio_put() */
if (folio_test_partially_mapped(folio)) {
- __folio_clear_partially_mapped(folio);
+ folio_clear_partially_mapped(folio);
mod_mthp_stat(folio_order(folio),
MTHP_STAT_NR_ANON_PARTIALLY_MAPPED, -1);
}
@@ -4168,7 +4169,7 @@ static ssize_t split_huge_pages_write(struct file *file, const char __user *buf,
size_t input_len = strlen(input_buf);
tok = strsep(&buf, ",");
- if (tok) {
+ if (tok && buf) {
strscpy(file_path, tok);
} else {
ret = -EINVAL;
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ea2ed8e301ef..cec4b121193f 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5340,7 +5340,7 @@ again:
break;
}
ret = copy_user_large_folio(new_folio, pte_folio,
- ALIGN_DOWN(addr, sz), dst_vma);
+ addr, dst_vma);
folio_put(pte_folio);
if (ret) {
folio_put(new_folio);
@@ -6643,8 +6643,7 @@ int hugetlb_mfill_atomic_pte(pte_t *dst_pte,
*foliop = NULL;
goto out;
}
- ret = copy_user_large_folio(folio, *foliop,
- ALIGN_DOWN(dst_addr, size), dst_vma);
+ ret = copy_user_large_folio(folio, *foliop, dst_addr, dst_vma);
folio_put(*foliop);
*foliop = NULL;
if (ret) {
diff --git a/mm/internal.h b/mm/internal.h
index cb8d8e8e3ffa..3bd08bafad04 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1285,12 +1285,6 @@ void touch_pud(struct vm_area_struct *vma, unsigned long addr,
void touch_pmd(struct vm_area_struct *vma, unsigned long addr,
pmd_t *pmd, bool write);
-static inline bool alloc_zeroed(void)
-{
- return static_branch_maybe(CONFIG_INIT_ON_ALLOC_DEFAULT_ON,
- &init_on_alloc);
-}
-
/*
* Parses a string with mem suffixes into its order. Useful to parse kernel
* parameters.
diff --git a/mm/kasan/kasan_test_c.c b/mm/kasan/kasan_test_c.c
index e0ec5a6d15be..99d4ff0ed57a 100644
--- a/mm/kasan/kasan_test_c.c
+++ b/mm/kasan/kasan_test_c.c
@@ -33,7 +33,7 @@
#define OOB_TAG_OFF (IS_ENABLED(CONFIG_KASAN_GENERIC) ? 0 : KASAN_GRANULE_SIZE)
-MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
+MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");
static bool multishot;
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 50fb19ad4388..3fe77a360f1c 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -201,7 +201,7 @@ static inline void fail_non_kasan_kunit_test(void) { }
#endif /* CONFIG_KUNIT */
-static DEFINE_SPINLOCK(report_lock);
+static DEFINE_RAW_SPINLOCK(report_lock);
static void start_report(unsigned long *flags, bool sync)
{
@@ -212,7 +212,7 @@ static void start_report(unsigned long *flags, bool sync)
lockdep_off();
/* Make sure we don't end up in loop. */
report_suppress_start();
- spin_lock_irqsave(&report_lock, *flags);
+ raw_spin_lock_irqsave(&report_lock, *flags);
pr_err("==================================================================\n");
}
@@ -222,7 +222,7 @@ static void end_report(unsigned long *flags, const void *addr, bool is_write)
trace_error_report_end(ERROR_DETECTOR_KASAN,
(unsigned long)addr);
pr_err("==================================================================\n");
- spin_unlock_irqrestore(&report_lock, *flags);
+ raw_spin_unlock_irqrestore(&report_lock, *flags);
if (!test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
check_panic_on_warn("KASAN");
switch (kasan_arg_fault) {
diff --git a/mm/memblock.c b/mm/memblock.c
index 0389ce5cd281..095c18b5c430 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -735,7 +735,7 @@ int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size)
/**
* memblock_validate_numa_coverage - check if amount of memory with
* no node ID assigned is less than a threshold
- * @threshold_bytes: maximal number of pages that can have unassigned node
+ * @threshold_bytes: maximal memory size that can have unassigned node
* ID (in bytes).
*
* A buggy firmware may report memory that does not belong to any node.
@@ -755,7 +755,7 @@ bool __init_memblock memblock_validate_numa_coverage(unsigned long threshold_byt
nr_pages += end_pfn - start_pfn;
}
- if ((nr_pages << PAGE_SHIFT) >= threshold_bytes) {
+ if ((nr_pages << PAGE_SHIFT) > threshold_bytes) {
mem_size_mb = memblock_phys_mem_size() >> 20;
pr_err("NUMA: no nodes coverage for %luMB of %luMB RAM\n",
(nr_pages << PAGE_SHIFT) >> 20, mem_size_mb);
diff --git a/mm/memcontrol-v1.h b/mm/memcontrol-v1.h
index 0e3b82951d91..144d71b65907 100644
--- a/mm/memcontrol-v1.h
+++ b/mm/memcontrol-v1.h
@@ -38,7 +38,7 @@ void mem_cgroup_id_put_many(struct mem_cgroup *memcg, unsigned int n);
iter = mem_cgroup_iter(NULL, iter, NULL))
/* Whether legacy memory+swap accounting is active */
-static bool do_memsw_account(void)
+static inline bool do_memsw_account(void)
{
return !cgroup_subsys_on_dfl(memory_cgrp_subsys);
}
diff --git a/mm/memory.c b/mm/memory.c
index 75c2dfd04f72..398c031be9ba 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4733,12 +4733,12 @@ static struct folio *alloc_anon_folio(struct vm_fault *vmf)
folio_throttle_swaprate(folio, gfp);
/*
* When a folio is not zeroed during allocation
- * (__GFP_ZERO not used), folio_zero_user() is used
- * to make sure that the page corresponding to the
- * faulting address will be hot in the cache after
- * zeroing.
+ * (__GFP_ZERO not used) or user folios require special
+ * handling, folio_zero_user() is used to make sure
+ * that the page corresponding to the faulting address
+ * will be hot in the cache after zeroing.
*/
- if (!alloc_zeroed())
+ if (user_alloc_needs_zeroing())
folio_zero_user(folio, vmf->address);
return folio;
}
@@ -6815,9 +6815,10 @@ static inline int process_huge_page(
return 0;
}
-static void clear_gigantic_page(struct folio *folio, unsigned long addr,
+static void clear_gigantic_page(struct folio *folio, unsigned long addr_hint,
unsigned int nr_pages)
{
+ unsigned long addr = ALIGN_DOWN(addr_hint, folio_size(folio));
int i;
might_sleep();
@@ -6851,13 +6852,14 @@ void folio_zero_user(struct folio *folio, unsigned long addr_hint)
}
static int copy_user_gigantic_page(struct folio *dst, struct folio *src,
- unsigned long addr,
+ unsigned long addr_hint,
struct vm_area_struct *vma,
unsigned int nr_pages)
{
- int i;
+ unsigned long addr = ALIGN_DOWN(addr_hint, folio_size(dst));
struct page *dst_page;
struct page *src_page;
+ int i;
for (i = 0; i < nr_pages; i++) {
dst_page = folio_page(dst, i);
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index bb37cd1a51d8..04f35659717a 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1080,6 +1080,10 @@ static long migrate_to_node(struct mm_struct *mm, int source, int dest,
mmap_read_lock(mm);
vma = find_vma(mm, 0);
+ if (unlikely(!vma)) {
+ mmap_read_unlock(mm);
+ return 0;
+ }
/*
* This does not migrate the range, but isolates all pages that
diff --git a/mm/migrate.c b/mm/migrate.c
index 2ce6b4b814df..cc68583c86f9 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -745,7 +745,7 @@ void folio_migrate_flags(struct folio *newfolio, struct folio *folio)
folio_set_readahead(newfolio);
folio_copy_owner(newfolio, folio);
- pgalloc_tag_copy(newfolio, folio);
+ pgalloc_tag_swap(newfolio, folio);
mem_cgroup_migrate(folio, newfolio);
}
diff --git a/mm/mmap.c b/mm/mmap.c
index 386429f7db5a..d32b7e701058 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -889,6 +889,7 @@ __get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,
if (get_area) {
addr = get_area(file, addr, len, pgoff, flags);
} else if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)
+ && !addr /* no hint */
&& IS_ALIGNED(len, PMD_SIZE)) {
/* Ensures that larger anonymous mappings are THP aligned. */
addr = thp_get_unmapped_area_vmflags(file, addr, len,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 1cb4b8c8886d..cae7b93864c2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1238,13 +1238,15 @@ static void split_large_buddy(struct zone *zone, struct page *page,
if (order > pageblock_order)
order = pageblock_order;
- while (pfn != end) {
+ do {
int mt = get_pfnblock_migratetype(page, pfn);
__free_one_page(page, pfn, zone, order, mt, fpi);
pfn += 1 << order;
+ if (pfn == end)
+ break;
page = pfn_to_page(pfn);
- }
+ } while (1);
}
static void free_one_page(struct zone *zone, struct page *page,
diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index 5297dcc38c37..5a882f2b10f9 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -279,7 +279,7 @@ static unsigned long pmdp_get_lockless_start(void) { return 0; }
static void pmdp_get_lockless_end(unsigned long irqflags) { }
#endif
-pte_t *__pte_offset_map(pmd_t *pmd, unsigned long addr, pmd_t *pmdvalp)
+pte_t *___pte_offset_map(pmd_t *pmd, unsigned long addr, pmd_t *pmdvalp)
{
unsigned long irqflags;
pmd_t pmdval;
diff --git a/mm/readahead.c b/mm/readahead.c
index 8f1cf599b572..ea650b8b02fb 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -458,8 +458,7 @@ void page_cache_ra_order(struct readahead_control *ractl,
struct file_ra_state *ra, unsigned int new_order)
{
struct address_space *mapping = ractl->mapping;
- pgoff_t start = readahead_index(ractl);
- pgoff_t index = start;
+ pgoff_t index = readahead_index(ractl);
unsigned int min_order = mapping_min_folio_order(mapping);
pgoff_t limit = (i_size_read(mapping->host) - 1) >> PAGE_SHIFT;
pgoff_t mark = index + ra->size - ra->async_size;
@@ -522,7 +521,7 @@ void page_cache_ra_order(struct readahead_control *ractl,
if (!err)
return;
fallback:
- do_page_cache_ra(ractl, ra->size - (index - start), ra->async_size);
+ do_page_cache_ra(ractl, ra->size, ra->async_size);
}
static unsigned long ractl_max_pages(struct readahead_control *ractl,
diff --git a/mm/shmem.c b/mm/shmem.c
index ccb9629a0f70..f6fb053ac50d 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -787,6 +787,14 @@ static bool shmem_huge_global_enabled(struct inode *inode, pgoff_t index,
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+static void shmem_update_stats(struct folio *folio, int nr_pages)
+{
+ if (folio_test_pmd_mappable(folio))
+ __lruvec_stat_mod_folio(folio, NR_SHMEM_THPS, nr_pages);
+ __lruvec_stat_mod_folio(folio, NR_FILE_PAGES, nr_pages);
+ __lruvec_stat_mod_folio(folio, NR_SHMEM, nr_pages);
+}
+
/*
* Somewhat like filemap_add_folio, but error if expected item has gone.
*/
@@ -821,10 +829,7 @@ static int shmem_add_to_page_cache(struct folio *folio,
xas_store(&xas, folio);
if (xas_error(&xas))
goto unlock;
- if (folio_test_pmd_mappable(folio))
- __lruvec_stat_mod_folio(folio, NR_SHMEM_THPS, nr);
- __lruvec_stat_mod_folio(folio, NR_FILE_PAGES, nr);
- __lruvec_stat_mod_folio(folio, NR_SHMEM, nr);
+ shmem_update_stats(folio, nr);
mapping->nrpages += nr;
unlock:
xas_unlock_irq(&xas);
@@ -852,8 +857,7 @@ static void shmem_delete_from_page_cache(struct folio *folio, void *radswap)
error = shmem_replace_entry(mapping, folio->index, folio, radswap);
folio->mapping = NULL;
mapping->nrpages -= nr;
- __lruvec_stat_mod_folio(folio, NR_FILE_PAGES, -nr);
- __lruvec_stat_mod_folio(folio, NR_SHMEM, -nr);
+ shmem_update_stats(folio, -nr);
xa_unlock_irq(&mapping->i_pages);
folio_put_refs(folio, nr);
BUG_ON(error);
@@ -1969,10 +1973,8 @@ static int shmem_replace_folio(struct folio **foliop, gfp_t gfp,
}
if (!error) {
mem_cgroup_replace_folio(old, new);
- __lruvec_stat_mod_folio(new, NR_FILE_PAGES, nr_pages);
- __lruvec_stat_mod_folio(new, NR_SHMEM, nr_pages);
- __lruvec_stat_mod_folio(old, NR_FILE_PAGES, -nr_pages);
- __lruvec_stat_mod_folio(old, NR_SHMEM, -nr_pages);
+ shmem_update_stats(new, nr_pages);
+ shmem_update_stats(old, -nr_pages);
}
xa_unlock_irq(&swap_mapping->i_pages);
diff --git a/mm/slub.c b/mm/slub.c
index 19980419b176..c2151c9fee22 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2189,9 +2189,24 @@ bool memcg_slab_post_charge(void *p, gfp_t flags)
folio = virt_to_folio(p);
if (!folio_test_slab(folio)) {
- return folio_memcg_kmem(folio) ||
- (__memcg_kmem_charge_page(folio_page(folio, 0), flags,
- folio_order(folio)) == 0);
+ int size;
+
+ if (folio_memcg_kmem(folio))
+ return true;
+
+ if (__memcg_kmem_charge_page(folio_page(folio, 0), flags,
+ folio_order(folio)))
+ return false;
+
+ /*
+ * This folio has already been accounted in the global stats but
+ * not in the memcg stats. So, subtract from the global and use
+ * the interface which adds to both global and memcg stats.
+ */
+ size = folio_size(folio);
+ node_stat_mod_folio(folio, NR_SLAB_UNRECLAIMABLE_B, -size);
+ lruvec_stat_mod_folio(folio, NR_SLAB_UNRECLAIMABLE_B, size);
+ return true;
}
slab = folio_slab(folio);
diff --git a/mm/vma.c b/mm/vma.c
index 8a454a7bbc80..bb2119e5a0d0 100644
--- a/mm/vma.c
+++ b/mm/vma.c
@@ -35,7 +35,7 @@ struct mmap_state {
.mm = mm_, \
.vmi = vmi_, \
.addr = addr_, \
- .end = (addr_) + len, \
+ .end = (addr_) + (len_), \
.pgoff = pgoff_, \
.pglen = PHYS_PFN(len_), \
.flags = flags_, \
@@ -2460,10 +2460,13 @@ unsigned long __mmap_region(struct file *file, unsigned long addr,
/* If flags changed, we might be able to merge, so try again. */
if (map.retry_merge) {
+ struct vm_area_struct *merged;
VMG_MMAP_STATE(vmg, &map, vma);
vma_iter_config(map.vmi, map.addr, map.end);
- vma_merge_existing_range(&vmg);
+ merged = vma_merge_existing_range(&vmg);
+ if (merged)
+ vma = merged;
}
__mmap_complete(&map, vma);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 7ed39d104201..5c88d0e90c20 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -3374,7 +3374,8 @@ void vfree(const void *addr)
struct page *page = vm->pages[i];
BUG_ON(!page);
- mod_memcg_page_state(page, MEMCG_VMALLOC, -1);
+ if (!(vm->flags & VM_MAP_PUT_PAGES))
+ mod_memcg_page_state(page, MEMCG_VMALLOC, -1);
/*
* High-order allocs for huge vmallocs are split, so
* can be freed as an array of order-0 allocations
@@ -3382,7 +3383,8 @@ void vfree(const void *addr)
__free_page(page);
cond_resched();
}
- atomic_long_sub(vm->nr_pages, &nr_vmalloc_pages);
+ if (!(vm->flags & VM_MAP_PUT_PAGES))
+ atomic_long_sub(vm->nr_pages, &nr_vmalloc_pages);
kvfree(vm->pages);
kfree(vm);
}
@@ -4093,7 +4095,8 @@ void *vrealloc_noprof(const void *p, size_t size, gfp_t flags)
/* Zero out spare memory. */
if (want_init_on_alloc(flags))
memset((void *)p + size, 0, old_size - size);
-
+ kasan_poison_vmalloc(p + size, old_size - size);
+ kasan_unpoison_vmalloc(p, size, KASAN_VMALLOC_PROT_NORMAL);
return (void *)p;
}
generated by cgit (git 2.34.1) at 2025-05-23 02:09:24 +0000