From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 15C44374739 for ; Tue, 24 Feb 2026 14:58:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771945093; cv=none; b=ATVoBXcotvXeO7jMyTDD1twmH+hYixmZbGS/wvnK+ZrHAQBH6wdOUeyXhu1NTN/km24wIosG+vq+yfmkvFSvioX689Q26AGpb0DByjDm93j/rA8RoygnLIQGdJPaA3G80ZWtS5aJMXH4GieDNBCCz2Z/c/RuvUBmKCz32/d9CW4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771945093; c=relaxed/simple; bh=fPIpOCMyu32nI1GWwfiGfNKzBR03Yr/196BEdi8T9rU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=qIm764u/zo4YWA523lL3IoxPFfOFGhsQEja5Q9h5lVupSDo0QWwdLVOeI+a5Uli5FLHonc3tXm5oGYC/EPg9rX9/MbQeLo2jUIfCbKDnjMGsDxUeBIMauSw/fOyq8Js1g8rbWbZ5kuMCq+Drgt3Rm/66jAuWVxVI55c6bwgKNH8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=0w7Q7ge1; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="0w7Q7ge1" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=+kPiVgs61kan1klqtEdKEojeJEKKIFclyhcImosTr/s=; b=0w7Q7ge159WS78y1lDSdUIEGPO IXbH/bntfVEFyZwx3XgiCnoqHxKWsRLNEc+3djr8SsvDpvQrW7FaQNDbGF9idi8rcIcPEORrbwfl5 C/RqUNzDopy4gg6uaZN9thwMUh6PXsC8dA4DVEXjycbqXsLhIfmJpY5qC/i3tBMG9xoyeOY0vQEQ1 GyUC+2uALn+oBGsuGqLxIvx64wc9lGOZOXD3YHk6Kmenai/wv9Tw5UnLWVCSCGTnH5SbI4WNG5f4a tIvVGdKioN6ggXdMwTwdgtHbZ81HRwAESgWjv29NcxwHOF2wtQKlpNaMtpA+YPlpn66XDIiMWhw39 1P7gIIvw==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vutrU-00000002Hb8-3HUs; Tue, 24 Feb 2026 14:58:08 +0000 Date: Tue, 24 Feb 2026 06:58:08 -0800 From: Christoph Hellwig To: Qu Wenruo Cc: Christoph Hellwig , Nanzhe Zhao , lsf-pc@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, willy@infradead.org, yi.zhang@huaweicloud.com, jaegeuk@kernel.org, Chao Yu , Barry Song <21cnbao@gmail.com>, Kundan Kumar Subject: Re: Iomap and compression? (Was "Re: [LSF/MM/BPF TOPIC] Large folio support: iomap framework changes versus filesystem-specific implementations") Message-ID: References: <75f43184.d57.19c7b2269dd.Coremail.nzzhao@126.com> <8a66f4d4-601c-4e1c-97f0-0ba7781d6ae8@suse.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Tue, Feb 24, 2026 at 08:23:35AM +1030, Qu Wenruo wrote: > > I still think btrfs would benefit greatly from killing the async > > submission workqueue, > > That's for sure. Although without that workqueue, where should the > compression workload happen? In the additional writeback threads mentioned below. > > and I hope that the multiple writeback thread > > work going on currently will help with this. I think you really should > > talk to Kundan. > > Mind to CC him/her? Added.