Re: [PATCH 1/5] block: rewrite blk_bvec_map_sg to avoid a nth_page call

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On Mon, Apr 15, 2019 at 10:52:42PM +0200, Christoph Hellwig wrote:
> On Mon, Apr 15, 2019 at 12:44:35PM -0700, Guenter Roeck wrote:
> > This patch causes crashes with various boot tests. Most sparc tests crash, as
> > well as several arm tests. Bisect results in both cases point to this patch.
> 
> That just means we trigger an existing bug more easily now.  I'll see
> if I can help with the issues.

Code which previously worked reliably no longer does. I would be quite
hesitant to call this "trigger an existing bug more easily". "Regression"
seems to be a more appropriate term - even more so as it seems to cause
'init' crashes, at least on arm.

Guenter



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