Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753440AbaA0Dw4 (ORCPT ); Sun, 26 Jan 2014 22:52:56 -0500 Received: from g4t0017.houston.hp.com ([15.201.24.20]:27181 "EHLO g4t0017.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753418AbaA0Dwy (ORCPT ); Sun, 26 Jan 2014 22:52:54 -0500 From: Davidlohr Bueso To: akpm@linux-foundation.org, iamjoonsoo.kim@lge.com Cc: riel@redhat.com, mgorman@suse.de, mhocko@suse.cz, aneesh.kumar@linux.vnet.ibm.com, kamezawa.hiroyu@jp.fujitsu.com, hughd@google.com, david@gibson.dropbear.id.au, js1304@gmail.com, liwanp@linux.vnet.ibm.com, n-horiguchi@ah.jp.nec.com, dhillf@gmail.com, rientjes@google.com, davidlohr@hp.com, aswin@hp.com, scott.norton@hp.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/8] mm, hugetlb: region manipulation functions take resv_map rather list_head Date: Sun, 26 Jan 2014 19:52:20 -0800 Message-Id: <1390794746-16755-3-git-send-email-davidlohr@hp.com> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1390794746-16755-1-git-send-email-davidlohr@hp.com> References: <1390794746-16755-1-git-send-email-davidlohr@hp.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joonsoo Kim To change a protection method for region tracking to find grained one, we pass the resv_map, instead of list_head, to region manipulation functions. This doesn't introduce any functional change, and it is just for preparing a next step. Reviewed-by: Aneesh Kumar K.V Signed-off-by: Joonsoo Kim Signed-off-by: Davidlohr Bueso --- mm/hugetlb.c | 30 +++++++++++++++++------------- 1 file changed, 17 insertions(+), 13 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index fbed1b7..572866d 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -151,8 +151,9 @@ struct file_region { long to; }; -static long region_add(struct list_head *head, long f, long t) +static long region_add(struct resv_map *resv, long f, long t) { + struct list_head *head = &resv->regions; struct file_region *rg, *nrg, *trg; /* Locate the region we are either in or before. */ @@ -187,8 +188,9 @@ static long region_add(struct list_head *head, long f, long t) return 0; } -static long region_chg(struct list_head *head, long f, long t) +static long region_chg(struct resv_map *resv, long f, long t) { + struct list_head *head = &resv->regions; struct file_region *rg, *nrg; long chg = 0; @@ -236,8 +238,9 @@ static long region_chg(struct list_head *head, long f, long t) return chg; } -static long region_truncate(struct list_head *head, long end) +static long region_truncate(struct resv_map *resv, long end) { + struct list_head *head = &resv->regions; struct file_region *rg, *trg; long chg = 0; @@ -266,8 +269,9 @@ static long region_truncate(struct list_head *head, long end) return chg; } -static long region_count(struct list_head *head, long f, long t) +static long region_count(struct resv_map *resv, long f, long t) { + struct list_head *head = &resv->regions; struct file_region *rg; long chg = 0; @@ -393,7 +397,7 @@ void resv_map_release(struct kref *ref) struct resv_map *resv_map = container_of(ref, struct resv_map, refs); /* Clear out any active regions before we release the map. */ - region_truncate(&resv_map->regions, 0); + region_truncate(resv_map, 0); kfree(resv_map); } @@ -1152,7 +1156,7 @@ static long vma_needs_reservation(struct hstate *h, pgoff_t idx = vma_hugecache_offset(h, vma, addr); struct resv_map *resv = inode->i_mapping->private_data; - return region_chg(&resv->regions, idx, idx + 1); + return region_chg(resv, idx, idx + 1); } else if (!is_vma_resv_set(vma, HPAGE_RESV_OWNER)) { return 1; @@ -1162,7 +1166,7 @@ static long vma_needs_reservation(struct hstate *h, pgoff_t idx = vma_hugecache_offset(h, vma, addr); struct resv_map *resv = vma_resv_map(vma); - err = region_chg(&resv->regions, idx, idx + 1); + err = region_chg(resv, idx, idx + 1); if (err < 0) return err; return 0; @@ -1178,14 +1182,14 @@ static void vma_commit_reservation(struct hstate *h, pgoff_t idx = vma_hugecache_offset(h, vma, addr); struct resv_map *resv = inode->i_mapping->private_data; - region_add(&resv->regions, idx, idx + 1); + region_add(resv, idx, idx + 1); } else if (is_vma_resv_set(vma, HPAGE_RESV_OWNER)) { pgoff_t idx = vma_hugecache_offset(h, vma, addr); struct resv_map *resv = vma_resv_map(vma); /* Mark this page used in the map. */ - region_add(&resv->regions, idx, idx + 1); + region_add(resv, idx, idx + 1); } } @@ -2276,7 +2280,7 @@ static void hugetlb_vm_op_close(struct vm_area_struct *vma) end = vma_hugecache_offset(h, vma, vma->vm_end); reserve = (end - start) - - region_count(&resv->regions, start, end); + region_count(resv, start, end); resv_map_put(vma); @@ -3178,7 +3182,7 @@ int hugetlb_reserve_pages(struct inode *inode, if (!vma || vma->vm_flags & VM_MAYSHARE) { resv_map = inode->i_mapping->private_data; - chg = region_chg(&resv_map->regions, from, to); + chg = region_chg(resv_map, from, to); } else { resv_map = resv_map_alloc(); @@ -3224,7 +3228,7 @@ int hugetlb_reserve_pages(struct inode *inode, * else has to be done for private mappings here */ if (!vma || vma->vm_flags & VM_MAYSHARE) - region_add(&resv_map->regions, from, to); + region_add(resv_map, from, to); return 0; out_err: if (vma) @@ -3240,7 +3244,7 @@ void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed) struct hugepage_subpool *spool = subpool_inode(inode); if (resv_map) - chg = region_truncate(&resv_map->regions, offset); + chg = region_truncate(resv_map, offset); spin_lock(&inode->i_lock); inode->i_blocks -= (blocks_per_huge_page(h) * freed); spin_unlock(&inode->i_lock); -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/