From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: [PATCH v6 43/99] shmem: Convert find_swap_entry to XArray Date: Wed, 17 Jan 2018 12:21:07 -0800 Message-ID: <20180117202203.19756-44-willy@infradead.org> References: <20180117202203.19756-1-willy@infradead.org> Return-path: 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=7lV9Dy41SGDjqxvduF6TDvhRDCy5QMhhHNIDqSIntNg=; b=dajkNVIQXVXU6NjaZ7K7jh7WL ARCZFPkCzzfJyoJlQrCKVvGuewOPiYLBNRipuaWGZ2l43De13Aydp+NP+VHRFwz1fxdodjLpC53jq 5YW9GUaHas/J2uOLzE5jNQq7NrsrO2ufmmPhidNGcXeYnpbOwgHfeQIAsxorkKtvialP8COKE4i8t OB4JAsaUAgWJ9k3VfHll37+X0HzssHrGgdQacpD9JzJvM9L3whE7mwfDUwfTBNqSYxeXqzRC/kC40 gCDQgJwM/tYA4Lqqk8wesUbdw+YIHGNWJR5pUFQsc5srTbL3CrtNx2PuTKecFxqt9pEEKqClmvxcU 8s3lM3cmg==; In-Reply-To: <20180117202203.19756-1-willy@infradead.org> Sender: owner-linux-mm@kvack.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-kernel@vger.kernel.org Cc: Matthew Wilcox , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-usb@vger.kernel.org, Bjorn Andersson , Stefano Stabellini , iommu@lists.linux-foundation.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, intel-gfx@lists.freedesktop.org, cgroups@vger.kernel.org, linux-sh@vger.kernel.org, David Howells From: Matthew Wilcox This is a 1:1 conversion. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index 654f367aca90..ce285ae635ea 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1076,28 +1076,27 @@ static void shmem_evict_inode(struct inode *inode) clear_inode(inode); } -static unsigned long find_swap_entry(struct radix_tree_root *root, void *item) +static unsigned long find_swap_entry(struct xarray *xa, void *item) { - struct radix_tree_iter iter; - void **slot; - unsigned long found = -1; + XA_STATE(xas, xa, 0); unsigned int checked = 0; + void *entry; rcu_read_lock(); - radix_tree_for_each_slot(slot, root, &iter, 0) { - if (*slot == item) { - found = iter.index; + xas_for_each(&xas, entry, ULONG_MAX) { + if (xas_retry(&xas, entry)) + continue; + if (entry == item) break; - } checked++; - if ((checked % 4096) != 0) + if ((checked % XA_CHECK_SCHED) != 0) continue; - slot = radix_tree_iter_resume(slot, &iter); + xas_pause(&xas); cond_resched_rcu(); } - rcu_read_unlock(); - return found; + + return xas_invalid(&xas) ? -1 : xas.xa_index; } /* -- 2.15.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org