Re: [Resend PATCHv4 1/1] mm: fix incorrect vbq reference in purge_fragmented_block

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On Wed, Jun 12, 2024 at 10:00:14AM +0800, Zhaoyang Huang wrote:
> On Wed, Jun 12, 2024 at 2:16 AM Uladzislau Rezki <urezki@xxxxxxxxx> wrote:
> >
> > >
> > > Sorry to bother you again. Are there any other comments or new patch
> > > on this which block some test cases of ANDROID that only accept ACKed
> > > one on its tree.
> > >
> > I have just returned from vacation. Give me some time to review your
> > patch. Meanwhile, do you have a reproducer? So i would like to see how
> > i can trigger an issue that is in question.
> This bug arises from an system wide android test which has been
> reported by many vendors. Keep mount/unmount an erofs partition is
> supposed to be a simple reproducer. IMO, the logic defect is obvious
> enough to be found by code review.
>
Baoquan, any objection about this v4?

Your proposal about inserting a new vmap-block based on it belongs
to, i.e. not per-this-cpu, should fix an issue. The problem is that
such way does __not__ pre-load a current CPU what is not good.

--
Uladzislau Rezki




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