Re: gfs2 iomap dealock, IOMAP_F_UNBALANCED

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On Tue, 9 Apr 2019 at 14:15, Christoph Hellwig <hch@xxxxxx> wrote:
> On Mon, Apr 08, 2019 at 03:44:05PM +0200, Jan Kara wrote:
> > > We won't be able to do a log flush while another transaction is
> > > active, but that's what's needed to clean dirty pages. iomap doesn't
> > > allow us to put the block allocation into a separate transaction from
> > > the page writes; for that, the opposite to the page_done hook would
> > > probably be needed.
> >
> > I agree that a ->page_prepare() hook would be probably the cleanest
> > solution for this.
>
> That doesn't sound too bad to me.

Okay, I'll see how the code for that will turn out.

Thanks,
Andreas




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