The patch titled Subject: zsmalloc: change return value unit of zs_get_total_size_bytes has been added to the -mm tree. Its filename is zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Minchan Kim <minchan@xxxxxxxxxx> Subject: zsmalloc: change return value unit of zs_get_total_size_bytes zs_get_total_size_bytes returns a amount of memory zsmalloc consumed with *byte unit* but zsmalloc operates *page unit* rather than byte unit so let's change the API so benefit we could get is that reduce unnecessary overhead (ie, change page unit with byte unit) in zsmalloc. Since return type is pages, "zs_get_total_pages" is better than "zs_get_total_size_bytes". Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx> Reviewed-by: Dan Streetman <ddstreet@xxxxxxxx> Cc: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx> Cc: Jerome Marchand <jmarchan@xxxxxxxxxx> Cc: <juno.choi@xxxxxxx> Cc: <seungho1.park@xxxxxxx> Cc: Luigi Semenzato <semenzato@xxxxxxxxxx> Cc: Nitin Gupta <ngupta@xxxxxxxxxx> Cc: Seth Jennings <sjennings@xxxxxxxxxxxxxx> Cc: David Horner <ds2horner@xxxxxxxxx> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/block/zram/zram_drv.c | 4 ++-- include/linux/zsmalloc.h | 2 +- mm/zsmalloc.c | 9 ++++----- 3 files changed, 7 insertions(+), 8 deletions(-) diff -puN drivers/block/zram/zram_drv.c~zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes drivers/block/zram/zram_drv.c --- a/drivers/block/zram/zram_drv.c~zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes +++ a/drivers/block/zram/zram_drv.c @@ -103,10 +103,10 @@ static ssize_t mem_used_total_show(struc down_read(&zram->init_lock); if (init_done(zram)) - val = zs_get_total_size_bytes(meta->mem_pool); + val = zs_get_total_pages(meta->mem_pool); up_read(&zram->init_lock); - return scnprintf(buf, PAGE_SIZE, "%llu\n", val); + return scnprintf(buf, PAGE_SIZE, "%llu\n", val << PAGE_SHIFT); } static ssize_t max_comp_streams_show(struct device *dev, diff -puN include/linux/zsmalloc.h~zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes include/linux/zsmalloc.h --- a/include/linux/zsmalloc.h~zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes +++ a/include/linux/zsmalloc.h @@ -46,6 +46,6 @@ void *zs_map_object(struct zs_pool *pool enum zs_mapmode mm); void zs_unmap_object(struct zs_pool *pool, unsigned long handle); -u64 zs_get_total_size_bytes(struct zs_pool *pool); +unsigned long zs_get_total_pages(struct zs_pool *pool); #endif diff -puN mm/zsmalloc.c~zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes mm/zsmalloc.c --- a/mm/zsmalloc.c~zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes +++ a/mm/zsmalloc.c @@ -297,7 +297,7 @@ static void zs_zpool_unmap(void *pool, u static u64 zs_zpool_total_size(void *pool) { - return zs_get_total_size_bytes(pool); + return zs_get_total_pages(pool) << PAGE_SHIFT; } static struct zpool_driver zs_zpool_driver = { @@ -1181,12 +1181,11 @@ void zs_unmap_object(struct zs_pool *poo } EXPORT_SYMBOL_GPL(zs_unmap_object); -u64 zs_get_total_size_bytes(struct zs_pool *pool) +unsigned long zs_get_total_pages(struct zs_pool *pool) { - u64 npages = atomic_long_read(&pool->pages_allocated); - return npages << PAGE_SHIFT; + return atomic_long_read(&pool->pages_allocated); } -EXPORT_SYMBOL_GPL(zs_get_total_size_bytes); +EXPORT_SYMBOL_GPL(zs_get_total_pages); module_init(zs_init); module_exit(zs_exit); _ Patches currently in -mm which might be from minchan@xxxxxxxxxx are zram-fix-incorrectly-stat-with-failed_reads.patch mm-zpool-use-prefixed-module-loading.patch mm-page_alloc-determine-migratetype-only-once.patch mm-thp-dont-hold-mmap_sem-in-khugepaged-when-allocating-thp.patch mm-compaction-defer-each-zone-individually-instead-of-preferred-zone.patch mm-compaction-defer-each-zone-individually-instead-of-preferred-zone-fix.patch mm-compaction-do-not-count-compact_stall-if-all-zones-skipped-compaction.patch mm-compaction-do-not-recheck-suitable_migration_target-under-lock.patch mm-compaction-move-pageblock-checks-up-from-isolate_migratepages_range.patch mm-compaction-reduce-zone-checking-frequency-in-the-migration-scanner.patch mm-compaction-khugepaged-should-not-give-up-due-to-need_resched.patch mm-compaction-khugepaged-should-not-give-up-due-to-need_resched-fix.patch mm-compaction-periodically-drop-lock-and-restore-irqs-in-scanners.patch mm-compaction-skip-rechecks-when-lock-was-already-held.patch mm-compaction-remember-position-within-pageblock-in-free-pages-scanner.patch mm-compaction-skip-buddy-pages-by-their-order-in-the-migrate-scanner.patch mm-rename-allocflags_to_migratetype-for-clarity.patch mm-compaction-pass-gfp-mask-to-compact_control.patch zsmalloc-move-pages_allocated-to-zs_pool.patch zsmalloc-change-return-value-unit-of-zs_get_total_size_bytes.patch zram-zram-memory-size-limitation.patch zram-zram-memory-size-limitation-fix.patch zram-report-maximum-used-memory.patch linux-next.patch debugging-keep-track-of-page-owners.patch page-owners-correct-page-order-when-to-free-page.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html