From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A827DC433DB for ; Mon, 18 Jan 2021 17:06:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 72D2722C9C for ; Mon, 18 Jan 2021 17:06:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406910AbhARRGZ (ORCPT ); Mon, 18 Jan 2021 12:06:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59134 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406815AbhARRE3 (ORCPT ); Mon, 18 Jan 2021 12:04:29 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 76523C061793; Mon, 18 Jan 2021 09:03:46 -0800 (PST) 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=sgzWDCA2cTSijPWdk4PnVmFhhShmXfcDIfAJcnswFEg=; b=t5W1BwjfxX92fxw8hvcL2WdYrE WYJa04g7l+B9ksoEIyKgzsEPo2Prf6dgTAdLF60bljwvYy3QVNm50S217GC3KZqz72N0iRoNUGEW/ ZeImvzpEcvna6sYGZ5o4ibBxX+waF6Hq9UspE6tWZYQWb7pooVmJuR6T+klY5s/xtlWVsn0XHMD8f 4HX0oyXqBoNJzNYFIXapLhFKmfTb/Swr6TLW3pP/+FTkGkUEXGFDgVCxDxYqWlxTiAKKHS6jkbfvT U6FJZdNLFvLiz0Nynd2hUioXHchhWLglIaq5uvIl2BlPswfakYS4wwniDK8l/FazIgjmRxyRAblTx 7CizR03Q==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1l1XwD-00D7XG-Vk; Mon, 18 Jan 2021 17:03:34 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org Subject: [PATCH v2 26/27] mm/filemap: Convert page wait queues to be folios Date: Mon, 18 Jan 2021 17:01:47 +0000 Message-Id: <20210118170148.3126186-27-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210118170148.3126186-1-willy@infradead.org> References: <20210118170148.3126186-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Reinforce that if we're waiting for a bit in a struct page, that's actually in the head page by changing the type from page to folio. Signed-off-by: Matthew Wilcox (Oracle) --- include/linux/pagemap.h | 6 +++--- mm/filemap.c | 30 ++++++++++++++++-------------- 2 files changed, 19 insertions(+), 17 deletions(-) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index d287e1a680e8..cf235fd60478 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -594,13 +594,13 @@ static inline pgoff_t linear_page_index(struct vm_area_struct *vma, /* This has the same layout as wait_bit_key - see fs/cachefiles/rdwr.c */ struct wait_page_key { - struct page *page; + struct folio *folio; int bit_nr; int page_match; }; struct wait_page_queue { - struct page *page; + struct folio *folio; int bit_nr; wait_queue_entry_t wait; }; @@ -608,7 +608,7 @@ struct wait_page_queue { static inline bool wake_page_match(struct wait_page_queue *wait_page, struct wait_page_key *key) { - if (wait_page->page != key->page) + if (wait_page->folio != key->folio) return false; key->page_match = 1; diff --git a/mm/filemap.c b/mm/filemap.c index 2b6caa0f9f93..803a28f7f718 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -987,11 +987,11 @@ EXPORT_SYMBOL(__page_cache_alloc); */ #define PAGE_WAIT_TABLE_BITS 8 #define PAGE_WAIT_TABLE_SIZE (1 << PAGE_WAIT_TABLE_BITS) -static wait_queue_head_t page_wait_table[PAGE_WAIT_TABLE_SIZE] __cacheline_aligned; +static wait_queue_head_t folio_wait_table[PAGE_WAIT_TABLE_SIZE] __cacheline_aligned; -static wait_queue_head_t *page_waitqueue(struct page *page) +static wait_queue_head_t *folio_waitqueue(struct folio *folio) { - return &page_wait_table[hash_ptr(page, PAGE_WAIT_TABLE_BITS)]; + return &folio_wait_table[hash_ptr(folio, PAGE_WAIT_TABLE_BITS)]; } void __init pagecache_init(void) @@ -999,7 +999,7 @@ void __init pagecache_init(void) int i; for (i = 0; i < PAGE_WAIT_TABLE_SIZE; i++) - init_waitqueue_head(&page_wait_table[i]); + init_waitqueue_head(&folio_wait_table[i]); page_writeback_init(); } @@ -1054,10 +1054,11 @@ static int wake_page_function(wait_queue_entry_t *wait, unsigned mode, int sync, */ flags = wait->flags; if (flags & WQ_FLAG_EXCLUSIVE) { - if (test_bit(key->bit_nr, &key->page->flags)) + if (test_bit(key->bit_nr, &key->folio->page.flags)) return -1; if (flags & WQ_FLAG_CUSTOM) { - if (test_and_set_bit(key->bit_nr, &key->page->flags)) + if (test_and_set_bit(key->bit_nr, + &key->folio->page.flags)) return -1; flags |= WQ_FLAG_DONE; } @@ -1091,12 +1092,12 @@ static int wake_page_function(wait_queue_entry_t *wait, unsigned mode, int sync, static void wake_up_folio_bit(struct folio *folio, int bit_nr) { - wait_queue_head_t *q = page_waitqueue(&folio->page); + wait_queue_head_t *q = folio_waitqueue(folio); struct wait_page_key key; unsigned long flags; wait_queue_entry_t bookmark; - key.page = &folio->page; + key.folio = folio; key.bit_nr = bit_nr; key.page_match = 0; @@ -1188,7 +1189,7 @@ int sysctl_page_lock_unfairness = 5; static inline int wait_on_folio_bit_common(struct folio *folio, int bit_nr, int state, enum behavior behavior) { - wait_queue_head_t *q = page_waitqueue(&folio->page); + wait_queue_head_t *q = folio_waitqueue(folio); int unfairness = sysctl_page_lock_unfairness; struct wait_page_queue wait_page; wait_queue_entry_t *wait = &wait_page.wait; @@ -1208,7 +1209,7 @@ static inline int wait_on_folio_bit_common(struct folio *folio, int bit_nr, init_wait(wait); wait->func = wake_page_function; - wait_page.page = &folio->page; + wait_page.folio = folio; wait_page.bit_nr = bit_nr; repeat: @@ -1340,10 +1341,10 @@ EXPORT_SYMBOL(wait_on_folio_bit_killable); static int __wait_on_folio_locked_async(struct folio *folio, struct wait_page_queue *wait, bool set) { - struct wait_queue_head *q = page_waitqueue(&folio->page); + struct wait_queue_head *q = folio_waitqueue(folio); int ret = 0; - wait->page = &folio->page; + wait->folio = folio; wait->bit_nr = PG_locked; spin_lock_irq(&q->lock); @@ -1400,12 +1401,13 @@ void put_and_wait_on_page_locked(struct page *page) */ void add_page_wait_queue(struct page *page, wait_queue_entry_t *waiter) { - wait_queue_head_t *q = page_waitqueue(page); + struct folio *folio = page_folio(page); + wait_queue_head_t *q = folio_waitqueue(folio); unsigned long flags; spin_lock_irqsave(&q->lock, flags); __add_wait_queue_entry_tail(q, waiter); - SetPageWaiters(page); + SetFolioWaiters(folio); spin_unlock_irqrestore(&q->lock, flags); } EXPORT_SYMBOL_GPL(add_page_wait_queue); -- 2.29.2