From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Matthew Wilcox 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 Subject: [PATCH v6 91/99] btrfs: Convert name_cache to XArray Date: Wed, 17 Jan 2018 12:21:55 -0800 Message-Id: <20180117202203.19756-92-willy@infradead.org> In-Reply-To: <20180117202203.19756-1-willy@infradead.org> References: <20180117202203.19756-1-willy@infradead.org> Sender: owner-linux-mm@kvack.org List-ID: From: Matthew Wilcox This is a very straightforward conversion. The handling of collisions in the namecache could be better handled with an hlist, but that's a patch for another day. Signed-off-by: Matthew Wilcox --- fs/btrfs/send.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index 20d3300bd268..3891a8e958fa 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -23,7 +23,7 @@ #include #include #include -#include +#include #include #include #include @@ -118,7 +118,7 @@ struct send_ctx { struct list_head new_refs; struct list_head deleted_refs; - struct radix_tree_root name_cache; + struct xarray name_cache; struct list_head name_cache_list; int name_cache_size; @@ -2021,8 +2021,7 @@ static int name_cache_insert(struct send_ctx *sctx, int ret = 0; struct list_head *nce_head; - nce_head = radix_tree_lookup(&sctx->name_cache, - (unsigned long)nce->ino); + nce_head = xa_load(&sctx->name_cache, (unsigned long)nce->ino); if (!nce_head) { nce_head = kmalloc(sizeof(*nce_head), GFP_KERNEL); if (!nce_head) { @@ -2031,7 +2030,8 @@ static int name_cache_insert(struct send_ctx *sctx, } INIT_LIST_HEAD(nce_head); - ret = radix_tree_insert(&sctx->name_cache, nce->ino, nce_head); + ret = xa_insert(&sctx->name_cache, nce->ino, nce_head, + GFP_KERNEL); if (ret < 0) { kfree(nce_head); kfree(nce); @@ -2050,8 +2050,7 @@ static void name_cache_delete(struct send_ctx *sctx, { struct list_head *nce_head; - nce_head = radix_tree_lookup(&sctx->name_cache, - (unsigned long)nce->ino); + nce_head = xa_load(&sctx->name_cache, (unsigned long)nce->ino); if (!nce_head) { btrfs_err(sctx->send_root->fs_info, "name_cache_delete lookup failed ino %llu cache size %d, leaking memory", @@ -2066,7 +2065,7 @@ static void name_cache_delete(struct send_ctx *sctx, * We may not get to the final release of nce_head if the lookup fails */ if (nce_head && list_empty(nce_head)) { - radix_tree_delete(&sctx->name_cache, (unsigned long)nce->ino); + xa_erase(&sctx->name_cache, (unsigned long)nce->ino); kfree(nce_head); } } @@ -2077,7 +2076,7 @@ static struct name_cache_entry *name_cache_search(struct send_ctx *sctx, struct list_head *nce_head; struct name_cache_entry *cur; - nce_head = radix_tree_lookup(&sctx->name_cache, (unsigned long)ino); + nce_head = xa_load(&sctx->name_cache, (unsigned long)ino); if (!nce_head) return NULL; @@ -6526,7 +6525,7 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg) INIT_LIST_HEAD(&sctx->new_refs); INIT_LIST_HEAD(&sctx->deleted_refs); - INIT_RADIX_TREE(&sctx->name_cache, GFP_KERNEL); + xa_init(&sctx->name_cache); INIT_LIST_HEAD(&sctx->name_cache_list); sctx->flags = arg->flags; -- 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