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Date: Tue, 20 Dec 2016 08:24:13 +1100 From: Dave Chinner <david@...morbit.com> To: Michal Hocko <mhocko@...nel.org> Cc: linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, Theodore Ts'o <tytso@....edu>, Chris Mason <clm@...com>, David Sterba <dsterba@...e.cz>, Jan Kara <jack@...e.cz>, ceph-devel@...r.kernel.org, cluster-devel@...hat.com, linux-nfs@...r.kernel.org, logfs@...fs.org, linux-xfs@...r.kernel.org, linux-ext4@...r.kernel.org, linux-btrfs@...r.kernel.org, linux-mtd@...ts.infradead.org, reiserfs-devel@...r.kernel.org, linux-ntfs-dev@...ts.sourceforge.net, linux-f2fs-devel@...ts.sourceforge.net, linux-afs@...ts.infradead.org, LKML <linux-kernel@...r.kernel.org>, Michal Hocko <mhocko@...e.com> Subject: Re: [PATCH 2/9] xfs: introduce and use KM_NOLOCKDEP to silence reclaim lockdep false positives On Thu, Dec 15, 2016 at 03:07:08PM +0100, Michal Hocko wrote: > From: Michal Hocko <mhocko@...e.com> > > Now that the page allocator offers __GFP_NOLOCKDEP let's introduce > KM_NOLOCKDEP alias for the xfs allocation APIs. While we are at it > also change KM_NOFS users introduced by b17cb364dbbb ("xfs: fix missing > KM_NOFS tags to keep lockdep happy") and use the new flag for them > instead. There is really no reason to make these allocations contexts > weaker just because of the lockdep which even might not be enabled > in most cases. > > Signed-off-by: Michal Hocko <mhocko@...e.com> I'd suggest that it might be better to drop this patch for now - it's not necessary for the context flag changeover but does introduce a risk of regressions if the conversion is wrong. Hence I think this is better as a completely separate series which audits and changes all the unnecessary KM_NOFS allocations in one go. I've never liked whack-a-mole style changes like this - do it once, do it properly.... Cheers, Dave. -- Dave Chinner david@...morbit.com -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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