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Date: Mon, 20 Dec 2010 08:54:13 +0900 From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> To: Miklos Szeredi <miklos@...redi.hu> Cc: akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] mm: add replace_page_cache_page() function On Fri, 17 Dec 2010 16:51:44 +0100 Miklos Szeredi <miklos@...redi.hu> wrote: > On Fri, 17 Dec 2010, KAMEZAWA Hiroyuki wrote: > > No. memory cgroup expects all pages should be found on LRU. But, IIUC, > > pages on this radix-tree will not be on LRU. So, memory cgroup can't find > > it at destroying cgroup and can't reduce "usage" of resource to be 0. > > This makes rmdir() returns -EBUSY. > > Oh, right. Yes, the page will be on the LRU (it needs to be, > otherwise the VM coulnd't reclaim it). After the > add_to_page_cache_locked is this: > > if (!(buf->flags & PIPE_BUF_FLAG_LRU)) > lru_cache_add_file(newpage); > > It will add the page to the LRU, unless it's already on it. > Thank you for clarification. Thanks, -Kame -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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