From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f72.google.com (mail-wm0-f72.google.com [74.125.82.72]) by kanga.kvack.org (Postfix) with ESMTP id 1A4F86B0010 for ; Thu, 22 Mar 2018 03:10:25 -0400 (EDT) Received: by mail-wm0-f72.google.com with SMTP id l3so3362750wmc.3 for ; Thu, 22 Mar 2018 00:10:25 -0700 (PDT) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id b5si2296474wrb.301.2018.03.22.00.10.23 for (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 22 Mar 2018 00:10:23 -0700 (PDT) Date: Thu, 22 Mar 2018 08:10:22 +0100 From: Michal Hocko Subject: Re: [PATCH 3/3] fs: Use memalloc_nofs_save in generic_perform_write Message-ID: <20180322071022.GW23100@dhcp22.suse.cz> References: <20180321224429.15860-1-rgoldwyn@suse.de> <20180321224429.15860-4-rgoldwyn@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180321224429.15860-4-rgoldwyn@suse.de> Sender: owner-linux-mm@kvack.org List-ID: To: Goldwyn Rodrigues Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, willy@infradead.org, david@fromorbit.com, Goldwyn Rodrigues On Wed 21-03-18 17:44:29, Goldwyn Rodrigues wrote: > From: Goldwyn Rodrigues > > Perform generic_perform_write() under memalloc_nofs because any allocations > should not recurse into fs writebacks. Why? What is the deadlock scenario? -- Michal Hocko SUSE Labs