From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1517253211; cv=none; d=google.com; s=arc-20160816; b=MEUCijcLCrNDogkul+zjzi1uDJj2wv69J30f9PWnLkwQgNoLqR/TDtd5FDb0SAog/D tMj/ku/55Y7e/bCtAZMn03zMr49T2OVW7wX1OMqSIIIzqUyHTsT5u09V0+9fdelROOHO AEynVe2E3bhjLBHTP2NnOSgHlZ7Uo3Z0xNSVDujiuRNcy5qO9CYBblIto9PDbJEemhXi qF18ko1FdNZNgC+LGQW9LcllqfwnSfgoAm2rm+AvRVt6SNIgrCqopO6S0dlPPtH9kNbf ZVT0A4Sh31JJT8Zmq2tPZrLvf5cEEXGxiG+1TtAST8PWwh+8mrA7d1XqvEG7QPaaMHx/ cMsQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:sender:dkim-signature :arc-authentication-results; bh=0Bpv/ltCCVS9JioOIHhloBiOdvvDNdBObyeKC7YMQrA=; b=X3uRN5/uoAotb1bETyil/DMtrzWVXTFYogiVQzlFcbdnXKdBbcq+wESxWXcglUmgN6 kOY/sbpcmoOoe5aLmKMpdppkFIgFnv8vrblspz9BUFAR/cooCouh3JoyWrnWlE+Jt68/ m5LYNxhAaqAagUDnlktc2g4C/1b46c0slgua/0xlibXOpQzyajhyHbSAL6eIukq+b8Pr z5/mQAfBXcCNmQ70P+rwgYhA28j+vPfnOdai/7aO7DZnTgaDxpilMDGfxadhHRrvGpek oM6YncE8pIO2MHb/bpPf+dDygzOEv1BtLnVQh4S1QiC9OHcOrwmcbP9+pPEHOq0Bm6S3 bJcw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=YQkpK7is; spf=pass (google.com: domain of htejun@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=htejun@gmail.com Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=YQkpK7is; spf=pass (google.com: domain of htejun@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=htejun@gmail.com X-Google-Smtp-Source: AH8x225wsl3aKU6q2Z/O33wDV9dX3ANuhZXbnBUcGVOiawkir7R/SKzqXDYN8h2ivIQJ+fr1Qd6vvg== Sender: Tejun Heo Date: Mon, 29 Jan 2018 11:13:23 -0800 From: Tejun Heo To: Cong Wang Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman Subject: Re: [PATCH] kernfs: account kernfs_node_cache as reclaimable Message-ID: <20180129191323.GB1121507@devbig577.frc2.facebook.com> References: <20180126224720.7331-1-xiyou.wangcong@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180126224720.7331-1-xiyou.wangcong@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1590696971021365431?= X-GMAIL-MSGID: =?utf-8?q?1590955303221083886?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Fri, Jan 26, 2018 at 02:47:20PM -0800, Cong Wang wrote: > Similar to commit df206988e03e > ("fs: fuse: account fuse_inode slab memory as reclaimable"), these > kernfs nodes are currently included in the unreclaimable slab counts - > SUnreclaim in /proc/meminfo. And they are reclaimable too and can be > freed by kernfs_evict_inode() via /proc/sys/vm/drop_caches easily. That evicts the inode, not the kernfs_node. kernfs_node is the backing storage for these filesystems. They aren't reclaimable. Thanks. -- tejun