From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: [PATCH v10 00/62] Convert page cache to XArray To: Matthew Wilcox Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Matthew Wilcox , Jan Kara , Jeff Layton , Lukas Czerner , Ross Zwisler , Christoph Hellwig , Nicholas Piggin , Ryusuke Konishi , linux-nilfs@vger.kernel.org, Jaegeuk Kim , Chao Yu , linux-f2fs-devel@lists.sourceforge.net, Oleg Drokin , Andreas Dilger , James Simmons , Mike Kravetz References: <20180330034245.10462-1-willy@infradead.org> <20180414195030.GB31523@bombadil.infradead.org> <20180414195859.GC31523@bombadil.infradead.org> From: Goldwyn Rodrigues Message-ID: <72e416d6-c723-fa0e-7411-8c8f1e9fbc22@suse.de> Date: Tue, 17 Apr 2018 16:49:30 -0500 MIME-Version: 1.0 In-Reply-To: <20180414195859.GC31523@bombadil.infradead.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: On 04/14/2018 02:58 PM, Matthew Wilcox wrote: > On Sat, Apr 14, 2018 at 12:50:30PM -0700, Matthew Wilcox wrote: >> On Mon, Apr 09, 2018 at 04:18:07PM -0500, Goldwyn Rodrigues wrote: >> >> I'm sorry I missed this email. My inbox is a disaster :( >> >>> I tried these patches against next-20180329 and added the patch for the >>> bug reported by Mike Kravetz. I am getting the following BUG on ext4 and >>> xfs, running generic/048 tests of fstests. Each trace is from a >>> different instance/run. >> >> Yikes. I haven't been able to reproduce this. Maybe it's a matter of >> filesystem or some other quirk. >> >> It seems easy for you to reproduce it, so would you mind bisecting it? >> Should be fairly straightforward; I'd start at commit "xarray: Add >> MAINTAINERS entry", since the page cache shouldn't be affected by anything >> up to that point, then bisect forwards from there. >> >>> BTW, for my convenience, do you have these patches in a public git tree? >> >> I didn't publish it; it's hard to push out a tree based on linux-next. >> I'll try to make that happen. > > Figured it out: > > http://git.infradead.org/users/willy/linux-dax.git/shortlog/refs/heads/xarray-20180413 > > aka > git://git.infradead.org/users/willy/linux-dax.git xarray-20180413 Thanks. I found the erroneous commit is e14a33134244 mm: Convert workingset to XArray mapping->nrexceptional is becoming negative. An easy way to reproduce is to perform a large enough I/O to force it to swap out and inodes are evicted. -- Goldwyn