From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Mon, 05 Nov 2012 23:50:16 +0100 (CET) Received: from mail-pa0-f49.google.com ([209.85.220.49]:43960 "EHLO mail-pa0-f49.google.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S6825973Ab2KEWrp5sFGd (ORCPT ); Mon, 5 Nov 2012 23:47:45 +0100 Received: by mail-pa0-f49.google.com with SMTP id bi5so3945704pad.36 for ; Mon, 05 Nov 2012 14:47:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=42IS+hQRw1ADfOLftQzPl7PxMg4IQjJkQMFWMKDSP6c=; b=BTWWcGITnt10w9ODDwzgVyd4fvZLIhoOhGhassjJtWC3ep5kwz47pCPaaIoLUk/Ur5 ixwrhWYgkYixMKf5MBFXzRLMEnpnjtUzCGgg2ndY7QYADYIE6r8tIzOnOP6K0K1vzc5M uE/Es2Df5i+72RiMVMrC6X3XAINjM+0HtJ9K0RPE0Mt4XolV0OKT02DlyAAer8hJCrlk XSdkRECfbXvnRVKXNca5RHFA0tTq4aoA00jhNElKODpOwlu8g8Jd9A1Y2O0TXfjw+oBK +T3ulyXwuveJEMwYrN/POaEgPFgBsMJGZsYmx+3NHhMQKfPQz44JHt86G7SiRU0t1y7s hhxw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=42IS+hQRw1ADfOLftQzPl7PxMg4IQjJkQMFWMKDSP6c=; b=ax8iMSvDmgYzZXOpUhFnS+Za6d5sZtIhORAIvUIQDzzjWhjXiROjW1NZ1B1F2jgYVb yNsBUHdxWsubGrrbMCqGYFtQGWrqqot1+kfiOFUVVxnK4VXIvrKwdP0ejNweApEuv0ub 3KuqNnQ+cNZo1dM0BOfQu2SJmykVdq4t6i+Bmo1WOC3gwShX7Gpxa4wJiMxkWwjAtnzP 9MmOmnQ4hRw1cepp//Q3qr7M8bAe/WPlAMRimFAxtA+d30XQuD83jVou5agh/6LN1HtQ qwScKHIL7VVUcmI+BjYOX9m7utCNmKVEDUuSF9vQO276eYNxrvZRld0lH2QybJtfKoe+ rPWg== Received: by 10.68.143.201 with SMTP id sg9mr35295148pbb.32.1352155665025; Mon, 05 Nov 2012 14:47:45 -0800 (PST) Received: from studio.mtv.corp.google.com (studio.mtv.corp.google.com [172.17.131.106]) by mx.google.com with ESMTPS id jx4sm11201653pbc.27.2012.11.05.14.47.43 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 05 Nov 2012 14:47:44 -0800 (PST) From: Michel Lespinasse To: Andrew Morton , Rik van Riel , Hugh Dickins , linux-kernel@vger.kernel.org, Russell King , Ralf Baechle , Paul Mundt , "David S. Miller" , Chris Metcalf , x86@kernel.org, William Irwin Cc: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-mips@linux-mips.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org Subject: [PATCH 08/16] mm: use vm_unmapped_area() in hugetlbfs Date: Mon, 5 Nov 2012 14:47:05 -0800 Message-Id: <1352155633-8648-9-git-send-email-walken@google.com> X-Mailer: git-send-email 1.7.7.3 In-Reply-To: <1352155633-8648-1-git-send-email-walken@google.com> References: <1352155633-8648-1-git-send-email-walken@google.com> X-Gm-Message-State: ALoCoQnq/dUP1bbwBdMYwgMn4N2NUks4IZs0SvotUNSdExWQTTwk8U+e7sfRc46RYQJV0omFa53G0wVARb4uHOtQlrLhwCKxPtrj2Mz4kMXC6O2bYA5NWskWcA9YN9e7J6NL+Lj9ZGONpz3m/De5De5gd33kTjCZqrVtr1Vya/cYGrJtkTZVDNCymlflu2I9Na01W5gWKwWaWtPstQTuMYMfu9K0Ldl55w== X-archive-position: 34878 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: walken@google.com Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips Return-Path: Update the hugetlb_get_unmapped_area function to make use of vm_unmapped_area() instead of implementing a brute force search. Signed-off-by: Michel Lespinasse --- fs/hugetlbfs/inode.c | 42 ++++++++---------------------------------- 1 files changed, 8 insertions(+), 34 deletions(-) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index c5bc355d8243..14bc0c1fb4fb 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -151,8 +151,8 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, { struct mm_struct *mm = current->mm; struct vm_area_struct *vma; - unsigned long start_addr; struct hstate *h = hstate_file(file); + struct vm_unmapped_area_info info; if (len & ~huge_page_mask(h)) return -EINVAL; @@ -173,39 +173,13 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, return addr; } - if (len > mm->cached_hole_size) - start_addr = mm->free_area_cache; - else { - start_addr = TASK_UNMAPPED_BASE; - mm->cached_hole_size = 0; - } - -full_search: - addr = ALIGN(start_addr, huge_page_size(h)); - - for (vma = find_vma(mm, addr); ; vma = vma->vm_next) { - /* At this point: (!vma || addr < vma->vm_end). */ - if (TASK_SIZE - len < addr) { - /* - * Start a new search - just in case we missed - * some holes. - */ - if (start_addr != TASK_UNMAPPED_BASE) { - start_addr = TASK_UNMAPPED_BASE; - mm->cached_hole_size = 0; - goto full_search; - } - return -ENOMEM; - } - - if (!vma || addr + len <= vma->vm_start) { - mm->free_area_cache = addr + len; - return addr; - } - if (addr + mm->cached_hole_size < vma->vm_start) - mm->cached_hole_size = vma->vm_start - addr; - addr = ALIGN(vma->vm_end, huge_page_size(h)); - } + info.flags = 0; + info.length = len; + info.low_limit = TASK_UNMAPPED_BASE; + info.high_limit = TASK_SIZE; + info.align_mask = PAGE_MASK & ~huge_page_mask(h); + info.align_offset = 0; + return vm_unmapped_area(&info); } #endif -- 1.7.7.3