From patchwork Mon Jun 6 20:40:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12870977 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CDCECCA482 for ; Mon, 6 Jun 2022 20:49:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234580AbiFFUtA (ORCPT ); Mon, 6 Jun 2022 16:49:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234724AbiFFUsB (ORCPT ); Mon, 6 Jun 2022 16:48:01 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3B24140417; Mon, 6 Jun 2022 13:41:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=UOfFr2kCuNNQQN1tCbzkVZPiRcxwNuFu8WhD+k3kEbk=; b=flnOFKhza3ughv7JVhOQB3UNwt unJkK+04gLu6Kap8iSsI5n17Petv8ajZ5SNf2z85X1sGiGV+/O4at1NY6yYUUh9otQThec0pBNhjV LQ3DHGqLZ9wgkV10cm5ylDRcJkF7gW/EYNYxjb7tw+PQI0TNbmMp3G6/DdD6j0PLwN6ftaBG2q963 iSWRXJtFiCQCMPYSwFs/2b4lt4PVrMv5PTRj/Y/MrNjJP6VatH2fdUtSsL6pkkS9nfDYj1sL4QV6Q OU3G9rQbdmhP7nl+qK3wD97RWO0r4M2EPPu0kLi/mPzqSB9/WTtKyiKeYoaJfIGkogFD5ZUkn3fsh T5XYWXLg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nyJWx-00B19Y-4o; Mon, 06 Jun 2022 20:40:55 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-aio@kvack.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-mm@kvack.org, linux-xfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, ocfs2-devel@oss.oracle.com, linux-mtd@lists.infradead.org, virtualization@lists.linux-foundation.org Subject: [PATCH 08/20] mm/migrate: Convert migrate_page() to migrate_folio() Date: Mon, 6 Jun 2022 21:40:38 +0100 Message-Id: <20220606204050.2625949-9-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220606204050.2625949-1-willy@infradead.org> References: <20220606204050.2625949-1-willy@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Convert all callers to pass a folio. Most have the folio already available. Switch all users from aops->migratepage to aops->migrate_folio. Also turn the documentation into kerneldoc. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig --- drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 4 +-- fs/btrfs/disk-io.c | 2 +- fs/nfs/write.c | 2 +- include/linux/migrate.h | 5 ++- mm/migrate.c | 37 +++++++++++---------- mm/migrate_device.c | 3 +- mm/shmem.c | 2 +- mm/swap_state.c | 2 +- 8 files changed, 30 insertions(+), 27 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c index 094f06b4ce33..8423df021b71 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c @@ -216,8 +216,8 @@ i915_gem_userptr_put_pages(struct drm_i915_gem_object *obj, * However...! * * The mmu-notifier can be invalidated for a - * migrate_page, that is alreadying holding the lock - * on the page. Such a try_to_unmap() will result + * migrate_folio, that is alreadying holding the lock + * on the folio. Such a try_to_unmap() will result * in us calling put_pages() and so recursively try * to lock the page. We avoid that deadlock with * a trylock_page() and in exchange we risk missing diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 9ceb73f683af..8e5f1fa1e972 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -968,7 +968,7 @@ static int btree_migrate_folio(struct address_space *mapping, if (folio_get_private(src) && !filemap_release_folio(src, GFP_KERNEL)) return -EAGAIN; - return migrate_page(mapping, &dst->page, &src->page, mode); + return migrate_folio(mapping, dst, src, mode); } #else #define btree_migrate_folio NULL diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 649b9e633459..69569696dde0 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -2139,7 +2139,7 @@ int nfs_migrate_folio(struct address_space *mapping, struct folio *dst, folio_wait_fscache(src); } - return migrate_page(mapping, &dst->page, &src->page, mode); + return migrate_folio(mapping, dst, src, mode); } #endif diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 069a89e847f3..4ef22806cd8e 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -25,9 +25,8 @@ extern const char *migrate_reason_names[MR_TYPES]; #ifdef CONFIG_MIGRATION extern void putback_movable_pages(struct list_head *l); -extern int migrate_page(struct address_space *mapping, - struct page *newpage, struct page *page, - enum migrate_mode mode); +int migrate_folio(struct address_space *mapping, struct folio *dst, + struct folio *src, enum migrate_mode mode); extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free, unsigned long private, enum migrate_mode mode, int reason, unsigned int *ret_succeeded); diff --git a/mm/migrate.c b/mm/migrate.c index e0a593e5b5f9..6232c291fdb9 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -594,34 +594,37 @@ EXPORT_SYMBOL(folio_migrate_copy); * Migration functions ***********************************************************/ -/* - * Common logic to directly migrate a single LRU page suitable for - * pages that do not use PagePrivate/PagePrivate2. +/** + * migrate_folio() - Simple folio migration. + * @mapping: The address_space containing the folio. + * @dst: The folio to migrate the data to. + * @src: The folio containing the current data. + * @mode: How to migrate the page. * - * Pages are locked upon entry and exit. + * Common logic to directly migrate a single LRU folio suitable for + * folios that do not use PagePrivate/PagePrivate2. + * + * Folios are locked upon entry and exit. */ -int migrate_page(struct address_space *mapping, - struct page *newpage, struct page *page, - enum migrate_mode mode) +int migrate_folio(struct address_space *mapping, struct folio *dst, + struct folio *src, enum migrate_mode mode) { - struct folio *newfolio = page_folio(newpage); - struct folio *folio = page_folio(page); int rc; - BUG_ON(folio_test_writeback(folio)); /* Writeback must be complete */ + BUG_ON(folio_test_writeback(src)); /* Writeback must be complete */ - rc = folio_migrate_mapping(mapping, newfolio, folio, 0); + rc = folio_migrate_mapping(mapping, dst, src, 0); if (rc != MIGRATEPAGE_SUCCESS) return rc; if (mode != MIGRATE_SYNC_NO_COPY) - folio_migrate_copy(newfolio, folio); + folio_migrate_copy(dst, src); else - folio_migrate_flags(newfolio, folio); + folio_migrate_flags(dst, src); return MIGRATEPAGE_SUCCESS; } -EXPORT_SYMBOL(migrate_page); +EXPORT_SYMBOL(migrate_folio); #ifdef CONFIG_BLOCK /* Returns true if all buffers are successfully locked */ @@ -672,7 +675,7 @@ static int __buffer_migrate_folio(struct address_space *mapping, head = folio_buffers(src); if (!head) - return migrate_page(mapping, &dst->page, &src->page, mode); + return migrate_folio(mapping, dst, src, mode); /* Check whether page does not have extra refs before we do more work */ expected_count = folio_expected_refs(mapping, src); @@ -849,7 +852,7 @@ static int fallback_migrate_folio(struct address_space *mapping, !filemap_release_folio(src, GFP_KERNEL)) return mode == MIGRATE_SYNC ? -EAGAIN : -EBUSY; - return migrate_page(mapping, &dst->page, &src->page, mode); + return migrate_folio(mapping, dst, src, mode); } /* @@ -877,7 +880,7 @@ static int move_to_new_folio(struct folio *dst, struct folio *src, if (likely(is_lru)) { if (!mapping) - rc = migrate_page(mapping, &dst->page, &src->page, mode); + rc = migrate_folio(mapping, dst, src, mode); else if (mapping->a_ops->migrate_folio) /* * Most folios have a mapping and most filesystems diff --git a/mm/migrate_device.c b/mm/migrate_device.c index 5052093d0262..5dd97c39ca6a 100644 --- a/mm/migrate_device.c +++ b/mm/migrate_device.c @@ -718,7 +718,8 @@ void migrate_vma_pages(struct migrate_vma *migrate) continue; } - r = migrate_page(mapping, newpage, page, MIGRATE_SYNC_NO_COPY); + r = migrate_folio(mapping, page_folio(newpage), + page_folio(page), MIGRATE_SYNC_NO_COPY); if (r != MIGRATEPAGE_SUCCESS) migrate->src[i] &= ~MIGRATE_PFN_MIGRATE; } diff --git a/mm/shmem.c b/mm/shmem.c index 313ae7df59d8..e37ff6a1a6d0 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -3801,7 +3801,7 @@ const struct address_space_operations shmem_aops = { .write_end = shmem_write_end, #endif #ifdef CONFIG_MIGRATION - .migratepage = migrate_page, + .migrate_folio = migrate_folio, #endif .error_remove_page = shmem_error_remove_page, }; diff --git a/mm/swap_state.c b/mm/swap_state.c index f5b6f5638908..0a2021fc55ad 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -33,7 +33,7 @@ static const struct address_space_operations swap_aops = { .writepage = swap_writepage, .dirty_folio = noop_dirty_folio, #ifdef CONFIG_MIGRATION - .migratepage = migrate_page, + .migrate_folio = migrate_folio, #endif };