The quilt patch titled Subject: mm: zswap: modify zswap_stored_pages to be atomic_long_t has been removed from the -mm tree. Its filename was mm-zswap-modify-zswap_stored_pages-to-be-atomic_long_t.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx> Subject: mm: zswap: modify zswap_stored_pages to be atomic_long_t Date: Mon, 30 Sep 2024 22:32:20 -0700 For zswap_store() to support large folios, we need to be able to do a batch update of zswap_stored_pages upon successful store of all pages in the folio. For this, we need to add folio_nr_pages(), which returns a long, to zswap_stored_pages. Link: https://lkml.kernel.org/r/20241001053222.6944-6-kanchana.p.sridhar@xxxxxxxxx Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx> Acked-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Nhat Pham <nphamcs@xxxxxxxxx> Cc: Chengming Zhou <chengming.zhou@xxxxxxxxx> Cc: "Huang, Ying" <ying.huang@xxxxxxxxx> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> Cc: Ryan Roberts <ryan.roberts@xxxxxxx> Cc: Shakeel Butt <shakeel.butt@xxxxxxxxx> Cc: Usama Arif <usamaarif642@xxxxxxxxx> Cc: Wajdi Feghali <wajdi.k.feghali@xxxxxxxxx> Cc: "Zou, Nanhai" <nanhai.zou@xxxxxxxxx> Cc: Barry Song <21cnbao@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/proc/meminfo.c | 2 +- include/linux/zswap.h | 2 +- mm/zswap.c | 19 +++++++++++++------ 3 files changed, 15 insertions(+), 8 deletions(-) --- a/fs/proc/meminfo.c~mm-zswap-modify-zswap_stored_pages-to-be-atomic_long_t +++ a/fs/proc/meminfo.c @@ -91,7 +91,7 @@ static int meminfo_proc_show(struct seq_ #ifdef CONFIG_ZSWAP show_val_kb(m, "Zswap: ", zswap_total_pages()); seq_printf(m, "Zswapped: %8lu kB\n", - (unsigned long)atomic_read(&zswap_stored_pages) << + (unsigned long)atomic_long_read(&zswap_stored_pages) << (PAGE_SHIFT - 10)); #endif show_val_kb(m, "Dirty: ", --- a/include/linux/zswap.h~mm-zswap-modify-zswap_stored_pages-to-be-atomic_long_t +++ a/include/linux/zswap.h @@ -7,7 +7,7 @@ struct lruvec; -extern atomic_t zswap_stored_pages; +extern atomic_long_t zswap_stored_pages; #ifdef CONFIG_ZSWAP --- a/mm/zswap.c~mm-zswap-modify-zswap_stored_pages-to-be-atomic_long_t +++ a/mm/zswap.c @@ -43,7 +43,7 @@ * statistics **********************************/ /* The number of compressed pages currently stored in zswap */ -atomic_t zswap_stored_pages = ATOMIC_INIT(0); +atomic_long_t zswap_stored_pages = ATOMIC_INIT(0); /* * The statistics below are not protected from concurrent access for @@ -802,7 +802,7 @@ static void zswap_entry_free(struct zswa obj_cgroup_put(entry->objcg); } zswap_entry_cache_free(entry); - atomic_dec(&zswap_stored_pages); + atomic_long_dec(&zswap_stored_pages); } /********************************* @@ -1233,7 +1233,7 @@ static unsigned long zswap_shrinker_coun nr_stored = memcg_page_state(memcg, MEMCG_ZSWAPPED); } else { nr_backing = zswap_total_pages(); - nr_stored = atomic_read(&zswap_stored_pages); + nr_stored = atomic_long_read(&zswap_stored_pages); } if (!nr_stored) @@ -1502,7 +1502,7 @@ bool zswap_store(struct folio *folio) } /* update stats */ - atomic_inc(&zswap_stored_pages); + atomic_long_inc(&zswap_stored_pages); count_vm_event(ZSWPOUT); return true; @@ -1651,6 +1651,13 @@ static int debugfs_get_total_size(void * } DEFINE_DEBUGFS_ATTRIBUTE(total_size_fops, debugfs_get_total_size, NULL, "%llu\n"); +static int debugfs_get_stored_pages(void *data, u64 *val) +{ + *val = atomic_long_read(&zswap_stored_pages); + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(stored_pages_fops, debugfs_get_stored_pages, NULL, "%llu\n"); + static int zswap_debugfs_init(void) { if (!debugfs_initialized()) @@ -1674,8 +1681,8 @@ static int zswap_debugfs_init(void) zswap_debugfs_root, &zswap_written_back_pages); debugfs_create_file("pool_total_size", 0444, zswap_debugfs_root, NULL, &total_size_fops); - debugfs_create_atomic_t("stored_pages", 0444, - zswap_debugfs_root, &zswap_stored_pages); + debugfs_create_file("stored_pages", 0444, + zswap_debugfs_root, NULL, &stored_pages_fops); return 0; } _ Patches currently in -mm which might be from kanchana.p.sridhar@xxxxxxxxx are