From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A54742905 for ; Wed, 21 Aug 2024 00:06:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724198760; cv=none; b=EjDBxVcPjtHB03ZLQW6z6EBriJP5OoDikae65nPisZN+4ZBaaoB9Q9ilkKd3D2mKk7ggpOqzpA7YO2HY+X1An/2jvXOJOMHVTKAUnNydRggBW1LsQorV9cmMpv7QVxvHjsEkUqsDMSogsBy5S3rtne+qmd0qbdlXFloZGFnsPuU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724198760; c=relaxed/simple; bh=bD4f+banDRpKYmqshYqnA61DpgodPc7vNs35oro+Is4=; h=Date:To:From:Subject:Message-Id; b=QDmGFr0K3XUrhCtDcqB9aXm+oNmQGecMaeQMJGruU6LQjVDxBOs3Z9lcpKpD8FWd1XjydctLzgjPLPAbRLAbED/zEn0WpEG8MelZtrwiXMhZwmQcb7T0mDyLTya8EijmYc+E4k0/JS+g4XOvV1RwHvlHhaboIloX7oqCSKmxZk8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=HbkOiQWq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="HbkOiQWq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7254EC4AF0B; Wed, 21 Aug 2024 00:06:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1724198760; bh=bD4f+banDRpKYmqshYqnA61DpgodPc7vNs35oro+Is4=; h=Date:To:From:Subject:From; b=HbkOiQWqlzyj1CfhQXQw9clZGi3nfnEuYwX5hSz4F9XFUKqVrP1n4cSZ79G63pxhB Kn1in2zXRHub1mxC4V5Ib8tCw0H7yrkgQC7bZCocHfS2lUxtyrY82ntwCG6GB5WjWA BZvu5ClVvFGF7B3bZVq+ORkSxgTDxBdc8VXMHOu8= Date: Tue, 20 Aug 2024 17:05:59 -0700 To: mm-commits@vger.kernel.org,ziy@nvidia.com,willy@infradead.org,shy828301@gmail.com,ryan.roberts@arm.com,hughd@google.com,david@redhat.com,21cnbao@gmail.com,baolin.wang@linux.alibaba.com,akpm@linux-foundation.org From: Andrew Morton Subject: + selftests-mm-support-shmem-mthp-collapse-testing.patch added to mm-unstable branch Message-Id: <20240821000600.7254EC4AF0B@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: selftests: mm: support shmem mTHP collapse testing has been added to the -mm mm-unstable branch. Its filename is selftests-mm-support-shmem-mthp-collapse-testing.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-support-shmem-mthp-collapse-testing.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 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/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Baolin Wang Subject: selftests: mm: support shmem mTHP collapse testing Date: Tue, 20 Aug 2024 17:49:17 +0800 Add shmem mTHP collpase testing. Similar to the anonymous page, users can use the '-s' parameter to specify the shmem mTHP size for testing. Link: https://lkml.kernel.org/r/fa44bfa20ca5b9fd6f9163a048f3d3c1e53cd0a8.1724140601.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang Cc: Barry Song <21cnbao@gmail.com> Cc: David Hildenbrand Cc: Hugh Dickins Cc: Matthew Wilcox Cc: Ryan Roberts Cc: Yang Shi Cc: Zi Yan Signed-off-by: Andrew Morton --- tools/testing/selftests/mm/khugepaged.c | 4 + tools/testing/selftests/mm/thp_settings.c | 46 +++++++++++++++++--- tools/testing/selftests/mm/thp_settings.h | 9 +++ 3 files changed, 51 insertions(+), 8 deletions(-) --- a/tools/testing/selftests/mm/khugepaged.c~selftests-mm-support-shmem-mthp-collapse-testing +++ a/tools/testing/selftests/mm/khugepaged.c @@ -1095,7 +1095,7 @@ static void usage(void) fprintf(stderr, "\n\tSupported Options:\n"); fprintf(stderr, "\t\t-h: This help message.\n"); fprintf(stderr, "\t\t-s: mTHP size, expressed as page order.\n"); - fprintf(stderr, "\t\t Defaults to 0. Use this size for anon allocations.\n"); + fprintf(stderr, "\t\t Defaults to 0. Use this size for anon or shmem allocations.\n"); exit(1); } @@ -1209,6 +1209,8 @@ int main(int argc, char **argv) default_settings.khugepaged.pages_to_scan = hpage_pmd_nr * 8; default_settings.hugepages[hpage_pmd_order].enabled = THP_INHERIT; default_settings.hugepages[anon_order].enabled = THP_ALWAYS; + default_settings.shmem_hugepages[hpage_pmd_order].enabled = SHMEM_INHERIT; + default_settings.shmem_hugepages[anon_order].enabled = SHMEM_ALWAYS; save_settings(); thp_push_settings(&default_settings); --- a/tools/testing/selftests/mm/thp_settings.c~selftests-mm-support-shmem-mthp-collapse-testing +++ a/tools/testing/selftests/mm/thp_settings.c @@ -33,10 +33,11 @@ static const char * const thp_defrag_str }; static const char * const shmem_enabled_strings[] = { + "never", "always", "within_size", "advise", - "never", + "inherit", "deny", "force", NULL @@ -200,6 +201,7 @@ void thp_write_num(const char *name, uns void thp_read_settings(struct thp_settings *settings) { unsigned long orders = thp_supported_orders(); + unsigned long shmem_orders = thp_shmem_supported_orders(); char path[PATH_MAX]; int i; @@ -234,12 +236,24 @@ void thp_read_settings(struct thp_settin settings->hugepages[i].enabled = thp_read_string(path, thp_enabled_strings); } + + for (i = 0; i < NR_ORDERS; i++) { + if (!((1 << i) & shmem_orders)) { + settings->shmem_hugepages[i].enabled = SHMEM_NEVER; + continue; + } + snprintf(path, PATH_MAX, "hugepages-%ukB/shmem_enabled", + (getpagesize() >> 10) << i); + settings->shmem_hugepages[i].enabled = + thp_read_string(path, shmem_enabled_strings); + } } void thp_write_settings(struct thp_settings *settings) { struct khugepaged_settings *khugepaged = &settings->khugepaged; unsigned long orders = thp_supported_orders(); + unsigned long shmem_orders = thp_shmem_supported_orders(); char path[PATH_MAX]; int enabled; int i; @@ -271,6 +285,15 @@ void thp_write_settings(struct thp_setti enabled = settings->hugepages[i].enabled; thp_write_string(path, thp_enabled_strings[enabled]); } + + for (i = 0; i < NR_ORDERS; i++) { + if (!((1 << i) & shmem_orders)) + continue; + snprintf(path, PATH_MAX, "hugepages-%ukB/shmem_enabled", + (getpagesize() >> 10) << i); + enabled = settings->shmem_hugepages[i].enabled; + thp_write_string(path, shmem_enabled_strings[enabled]); + } } struct thp_settings *thp_current_settings(void) @@ -324,17 +347,18 @@ void thp_set_read_ahead_path(char *path) dev_queue_read_ahead_path[sizeof(dev_queue_read_ahead_path) - 1] = '\0'; } -unsigned long thp_supported_orders(void) +static unsigned long __thp_supported_orders(bool is_shmem) { unsigned long orders = 0; char path[PATH_MAX]; char buf[256]; - int ret; - int i; + int ret, i; + char anon_dir[] = "enabled"; + char shmem_dir[] = "shmem_enabled"; for (i = 0; i < NR_ORDERS; i++) { - ret = snprintf(path, PATH_MAX, THP_SYSFS "hugepages-%ukB/enabled", - (getpagesize() >> 10) << i); + ret = snprintf(path, PATH_MAX, THP_SYSFS "hugepages-%ukB/%s", + (getpagesize() >> 10) << i, is_shmem ? shmem_dir : anon_dir); if (ret >= PATH_MAX) { printf("%s: Pathname is too long\n", __func__); exit(EXIT_FAILURE); @@ -347,3 +371,13 @@ unsigned long thp_supported_orders(void) return orders; } + +unsigned long thp_supported_orders(void) +{ + return __thp_supported_orders(false); +} + +unsigned long thp_shmem_supported_orders(void) +{ + return __thp_supported_orders(true); +} --- a/tools/testing/selftests/mm/thp_settings.h~selftests-mm-support-shmem-mthp-collapse-testing +++ a/tools/testing/selftests/mm/thp_settings.h @@ -22,10 +22,11 @@ enum thp_defrag { }; enum shmem_enabled { + SHMEM_NEVER, SHMEM_ALWAYS, SHMEM_WITHIN_SIZE, SHMEM_ADVISE, - SHMEM_NEVER, + SHMEM_INHERIT, SHMEM_DENY, SHMEM_FORCE, }; @@ -46,6 +47,10 @@ struct khugepaged_settings { unsigned long pages_to_scan; }; +struct shmem_hugepages_settings { + enum shmem_enabled enabled; +}; + struct thp_settings { enum thp_enabled thp_enabled; enum thp_defrag thp_defrag; @@ -54,6 +59,7 @@ struct thp_settings { struct khugepaged_settings khugepaged; unsigned long read_ahead_kb; struct hugepages_settings hugepages[NR_ORDERS]; + struct shmem_hugepages_settings shmem_hugepages[NR_ORDERS]; }; int read_file(const char *path, char *buf, size_t buflen); @@ -76,5 +82,6 @@ void thp_save_settings(void); void thp_set_read_ahead_path(char *path); unsigned long thp_supported_orders(void); +unsigned long thp_shmem_supported_orders(void); #endif /* __THP_SETTINGS_H__ */ _ Patches currently in -mm which might be from baolin.wang@linux.alibaba.com are mm-shmem-simplify-the-suitable-huge-orders-validation-for-tmpfs.patch mm-shmem-rename-shmem_is_huge-to-shmem_huge_global_enabled.patch mm-shmem-move-shmem_huge_global_enabled-into-shmem_allowable_huge_orders.patch mm-swap-extend-swap_shmem_alloc-to-support-batch-swap_map_shmem-flag-setting.patch mm-shmem-extend-shmem_partial_swap_usage-to-support-large-folio-swap.patch mm-filemap-use-xa_get_order-to-get-the-swap-entry-order.patch mm-shmem-use-swap_free_nr-to-free-shmem-swap-entries.patch mm-shmem-support-large-folio-allocation-for-shmem_replace_folio.patch mm-shmem-drop-folio-reference-count-using-nr_pages-in-shmem_delete_from_page_cache.patch mm-shmem-split-large-entry-if-the-swapin-folio-is-not-large.patch mm-shmem-support-large-folio-swap-out.patch mm-khugepaged-expand-the-is_refcount_suitable-to-support-file-folios.patch mm-khugepaged-use-the-number-of-pages-in-the-folio-to-check-the-reference-count.patch mm-khugepaged-support-shmem-mthp-copy.patch mm-khugepaged-support-shmem-mthp-collapse.patch selftests-mm-support-shmem-mthp-collapse-testing.patch