From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: [PATCH v6 61/99] dax: Convert dax_writeback_one to XArray Date: Wed, 17 Jan 2018 12:21:25 -0800 Message-ID: <20180117202203.19756-62-willy@infradead.org> References: <20180117202203.19756-1-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=ATGFKhqyH2T5U1HUZMqsryAWBagEjgPv8+V/QavNJZs=; b=len3nI1klTnRL55XL8ly3BFYzE KsuZHCbKK9sffb75cLlNpcSx+z1OWidGIRuU1/X7wIAfemO2ObuSEnBBcgkjO6GwGgUV6t4ej0CUs IgvOGNDTYjp74Ub+/9UiA4kDi18r3GlCDvcjoiOb08uJEmLL0lV/OyeiykulyNzQCICA=; 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=ATGFKhqyH2T5U1HUZMqsryAWBagEjgPv8+V/QavNJZs=; b=b3tomVHLyTRRyKwkWSVtpPaxV8 k2uCQFH1trGoYwKV7HJhUsUHvFxXYo4+1hvHutjC38YHA8Ir0snMCQqtGjTQxTQ0EyQ5ruKiOl2PD u0tWaWdnFNxa5gjfvOoJwqX4GlM0bllWTMdX9dLsv7rLyjFas9DncWiZWcYBbRVnmGHw=; 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=ATGFKhqyH2T5U1HUZMqsryAWBagEjgPv8+V/QavNJZs=; b=uVzUKcEixPLeXPEn9sddjJFQ2 idpcAGr+08afe1jCf+/QXiRryHy8v0xWjs3avWDMO994NSWNC+rWmKsJhR/NCJp1q3nI+/mb9ZdbJ bysZoMEXC0wWdYxEgCJZrdOfDn1mQFikQAZHk7hSr4wbWdfoMeoQI9THHjd8Vk5gkIDht0Vdgf5A8 gQQraXx8Z723i1kK26rgKRdbcsEuCLsy2FarBPlFEfaULt75ClnKoHn21R3Dz76Adcjz+VAY8G7qu 6vYQaxi8wW1rAnVeYJ5NnXm0bTMDUY/TiRSWYbgjd2/QY+/ItqY4jdl7CMM/bb/fKJFMotV8JX57I kEVDj4p5g==; In-Reply-To: <20180117202203.19756-1-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: linux-s390@vger.kernel.org, David Howells , linux-nilfs@vger.kernel.org, Matthew Wilcox , linux-sh@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-usb@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Stefano Stabellini , linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, Bjorn Andersson , linux-btrfs@vger.kernel.org From: Matthew Wilcox Likewise easy Signed-off-by: Matthew Wilcox --- fs/dax.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 9a30224da4d6..b66b8c896ed8 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -632,8 +632,7 @@ static int dax_writeback_one(struct block_device *bdev, struct dax_device *dax_dev, struct address_space *mapping, pgoff_t index, void *entry) { - struct radix_tree_root *pages = &mapping->pages; - XA_STATE(xas, pages, index); + XA_STATE(xas, &mapping->pages, index); void *entry2, *kaddr; long ret = 0, id; sector_t sector; @@ -648,7 +647,7 @@ static int dax_writeback_one(struct block_device *bdev, if (WARN_ON(!xa_is_value(entry))) return -EIO; - xa_lock_irq(&mapping->pages); + xas_lock_irq(&xas); entry2 = get_unlocked_mapping_entry(&xas); /* Entry got punched out / reallocated? */ if (!entry2 || WARN_ON_ONCE(!xa_is_value(entry2))) @@ -667,7 +666,7 @@ static int dax_writeback_one(struct block_device *bdev, } /* Another fsync thread may have already written back this entry */ - if (!radix_tree_tag_get(pages, index, PAGECACHE_TAG_TOWRITE)) + if (!xas_get_tag(&xas, PAGECACHE_TAG_TOWRITE)) goto put_unlocked; /* Lock the entry to serialize with page faults */ entry = lock_slot(&xas); @@ -678,8 +677,8 @@ static int dax_writeback_one(struct block_device *bdev, * at the entry only under xa_lock and once they do that they will * see the entry locked and wait for it to unlock. */ - radix_tree_tag_clear(pages, index, PAGECACHE_TAG_TOWRITE); - xa_unlock_irq(&mapping->pages); + xas_clear_tag(&xas, PAGECACHE_TAG_TOWRITE); + xas_unlock_irq(&xas); /* * Even if dax_writeback_mapping_range() was given a wbc->range_start @@ -717,9 +716,7 @@ static int dax_writeback_one(struct block_device *bdev, * the pfn mappings are writeprotected and fault waits for mapping * entry lock. */ - xa_lock_irq(&mapping->pages); - radix_tree_tag_clear(pages, index, PAGECACHE_TAG_DIRTY); - xa_unlock_irq(&mapping->pages); + xa_clear_tag(&mapping->pages, index, PAGECACHE_TAG_DIRTY); trace_dax_writeback_one(mapping->host, index, size >> PAGE_SHIFT); dax_unlock: dax_read_unlock(id); @@ -728,7 +725,7 @@ static int dax_writeback_one(struct block_device *bdev, put_unlocked: put_unlocked_mapping_entry(&xas, entry2); - xa_unlock_irq(&mapping->pages); + xas_unlock_irq(&xas); return ret; } -- 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