Re: [PATCH 06/18] xfs: don't clear the "dinode core" in xfs_inode_alloc

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On Wed, Mar 24, 2021 at 07:28:49PM +0100, Christoph Hellwig wrote:
> On Wed, Mar 24, 2021 at 11:27:25AM -0700, Darrick J. Wong wrote:
> > On Wed, Mar 24, 2021 at 03:21:17PM +0100, Christoph Hellwig wrote:
> > > The xfs_icdinode structure just contains a random mix of inode field,
> > > which are all read from the on-disk inode and mostly not looked at
> > > before reading the inode or initializing a new inode cluster.  The
> > > only exceptions are the forkoff and blocks field, which are used
> > > in sanity checks for freshly allocated inodes.
> > > 
> > > Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> > 
> > Hmm, does this fix the crash I complained about last time?
> > 
> > https://lore.kernel.org/linux-xfs/20200702183426.GD7606@magnolia/
> > 
> > I /think/ it does, but can't tell for sure from the comments. :/
> 
> Your crash was due to the uninitialized diflags2, which is fixed very
> early on in the series.

Ah, ok.  I thought that might be the proper fix for that.  At the very
least, the repro instructions don't lead to a crash this time, so I'll
toss this series at fstests cloud and see if anything falls out.

Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>

--D




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