From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: [PATCH v5 35/78] mm: Convert delete_from_swap_cache to XArray Date: Fri, 15 Dec 2017 14:04:07 -0800 Message-ID: <20171215220450.7899-36-willy@infradead.org> References: <20171215220450.7899-1-willy@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=c0GHRARZm8OThPO1seSWcx1WxYTQ7jAIc5AY1VVZYG8=; b=azVJFlGJvzPhlgkEPRRB8dwn53 4wNeiFdDoSpzU6aeSQHG6IlVjdoSjLgtnyNcjMGO6kFSi+BxihlyNccWLI1IG3v3LTqrVYRIjuD+S YsCPfOXf42BGp+4y6MErQRlexSQmwlAPr05sumCHwaxlKxZChQ7gc1M3eGUL5YD1pd98=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To :MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=c0GHRARZm8OThPO1seSWcx1WxYTQ7jAIc5AY1VVZYG8=; b=EiO4oIITyBP6eQ17c8kFEIoQm2 WEbpVCkFD0drvYF7fl/BNq8mpnKqDTQu+pyUDv1+/rEDtlE6FJXTfKquF4icK/2+SC4WrHKYDR4jq ErSsXiZx6glLKOruUHOh//AvI+2xzCxQXaJlawUK7e/HuswSqIDUQVFlCl7rWh5yAe7Y=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=c0GHRARZm8OThPO1seSWcx1WxYTQ7jAIc5AY1VVZYG8=; b=K4mLwBuz+yWzvOI8tIj0eF2TE immw4vkv8LghXNOzsVBKrs8sztNUKRmYZQi27qMC7Sqb+Y/Gi9YGfEbpnrigMWaoXQ47KiENk6VNZ emQMngl7mNH6j+UoDOfddLFvyRlRP4rFJPC/PwUYDXwyn8q4yqs5l57r+WNgjVzBmq/mtam7CKx6o RrWgx/iww+eXFZAPSX3OqhmahNpgy5hjxlbd4qz828E+Nle74vZw9TP0541F2XlxwTGyBCdJyjYXz sOFjpIWo3CqcDF1SaeyqpfK6ZkoTvtthTHIV6qkGXoqGAqIkmg4N8gRgIt5s6KnJz2NAM0pXwDVUx 48lV9QQmA==; In-Reply-To: <20171215220450.7899-1-willy@infradead.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: linux-kernel@vger.kernel.org Cc: Jens Axboe , linux-xfs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-raid@vger.kernel.org, Matthew Wilcox , Marc Zyngier , linux-usb@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, David Howells , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Ross Zwisler , Rehas Sachdeva , Shaohua Li , linux-btrfs@vger.kernel.org From: Matthew Wilcox Both callers of __delete_from_swap_cache have the swp_entry_t already, so pass that in to make constructing the XA_STATE easier. Signed-off-by: Matthew Wilcox --- include/linux/swap.h | 5 +++-- mm/swap_state.c | 24 ++++++++++-------------- mm/vmscan.c | 2 +- 3 files changed, 14 insertions(+), 17 deletions(-) diff --git a/include/linux/swap.h b/include/linux/swap.h index e4a8afcb214c..569a8ac4fe3f 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -413,7 +413,7 @@ extern void show_swap_cache_info(void); extern int add_to_swap(struct page *page); extern int add_to_swap_cache(struct page *, swp_entry_t, gfp_t); extern int __add_to_swap_cache(struct page *page, swp_entry_t entry); -extern void __delete_from_swap_cache(struct page *); +extern void __delete_from_swap_cache(struct page *, swp_entry_t entry); extern void delete_from_swap_cache(struct page *); extern void free_page_and_swap_cache(struct page *); extern void free_pages_and_swap_cache(struct page **, int); @@ -588,7 +588,8 @@ static inline int add_to_swap_cache(struct page *page, swp_entry_t entry, return -1; } -static inline void __delete_from_swap_cache(struct page *page) +static inline void __delete_from_swap_cache(struct page *page, + swp_entry_t entry) { } diff --git a/mm/swap_state.c b/mm/swap_state.c index a57b5ad4c503..219e3b4f09e6 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -154,23 +154,22 @@ int add_to_swap_cache(struct page *page, swp_entry_t entry, gfp_t gfp) * This must be called only on pages that have * been verified to be in the swap cache. */ -void __delete_from_swap_cache(struct page *page) +void __delete_from_swap_cache(struct page *page, swp_entry_t entry) { - struct address_space *address_space; + struct address_space *address_space = swap_address_space(entry); int i, nr = hpage_nr_pages(page); - swp_entry_t entry; - pgoff_t idx; + pgoff_t idx = swp_offset(entry); + XA_STATE(xas, &address_space->pages, idx); VM_BUG_ON_PAGE(!PageLocked(page), page); VM_BUG_ON_PAGE(!PageSwapCache(page), page); VM_BUG_ON_PAGE(PageWriteback(page), page); - entry.val = page_private(page); - address_space = swap_address_space(entry); - idx = swp_offset(entry); for (i = 0; i < nr; i++) { - radix_tree_delete(&address_space->pages, idx + i); + void *entry = xas_store(&xas, NULL); + VM_BUG_ON_PAGE(entry != page + i, entry); set_page_private(page + i, 0); + xas_next(&xas); } ClearPageSwapCache(page); address_space->nrpages -= nr; @@ -246,14 +245,11 @@ int add_to_swap(struct page *page) */ void delete_from_swap_cache(struct page *page) { - swp_entry_t entry; - struct address_space *address_space; - - entry.val = page_private(page); + swp_entry_t entry = { .val = page_private(page) }; + struct address_space *address_space = swap_address_space(entry); - address_space = swap_address_space(entry); xa_lock_irq(&address_space->pages); - __delete_from_swap_cache(page); + __delete_from_swap_cache(page, entry); xa_unlock_irq(&address_space->pages); put_swap_page(page, entry); diff --git a/mm/vmscan.c b/mm/vmscan.c index 96316bd91f91..51df3f9ba0bc 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -715,7 +715,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page, if (PageSwapCache(page)) { swp_entry_t swap = { .val = page_private(page) }; mem_cgroup_swapout(page, swap); - __delete_from_swap_cache(page); + __delete_from_swap_cache(page, swap); xa_unlock_irqrestore(&mapping->pages, flags); put_swap_page(page, swap); } else { -- 2.15.1 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot