Linux RDMA and InfiniBand development
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From: Leon Romanovsky <leon@kernel.org>
To: Doug Ledford <dledford@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	linux-rdma <linux-rdma@vger.kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	"Gunthorpe, Jason" <jgg@ziepe.ca>
Subject: Re: [GIT PULL] Please pull rdma.git
Date: Mon, 29 Apr 2019 21:00:55 +0300	[thread overview]
Message-ID: <20190429180055.GX6705@mtr-leonro.mtl.com> (raw)
In-Reply-To: <a532d88432b2fd581d39faf12ce3c3c31015b45a.camel@redhat.com>

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On Mon, Apr 29, 2019 at 01:13:01PM -0400, Doug Ledford wrote:
> On Mon, 2019-04-29 at 09:48 -0700, Linus Torvalds wrote:
> > On Mon, Apr 29, 2019 at 9:29 AM Doug Ledford <dledford@redhat.com> wrote:
> > >
> > >  drivers/infiniband/core/uverbs_main.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > This trivial one-liner is actually incorrect.
> >
> > It should use 'vmf->address', because the point of the ZERO_PAGE
> > argument is to pick the page with the right virtual address alias for
> > broken architectures that need those kinds.
> >
> > I'm actually surprised s390 wants it, usually it's just MIPS that has
> > the horribly broken virtual address translation stuff. But it looks
> > like for s390 it's at least only a performance issue (ie it causes
> > some aliases in L1 that cause cacheline ping-pong rather than anything
> > else).
>
> That's what I get for listening to Jason ;-)
>
> Well, since you have just essentially re-written the patch to be
> correct, you are now the developer of origin.  Do you want to commit the
> fix directly or shall I respin it for you to pull?

Linus already committed it.

The whole breakage is mystery for me, the patch which introduced
breakage, got successful build report from 0-build.

Thanks

>
> --
> Doug Ledford <dledford@redhat.com>
>     GPG KeyID: B826A3330E572FDD
>     Key fingerprint = AE6B 1BDA 122B 23B4 265B  1274 B826 A333 0E57 2FDD



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  reply	other threads:[~2019-04-29 18:00 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-29 16:28 [GIT PULL] Please pull rdma.git Doug Ledford
2019-04-29 16:48 ` Linus Torvalds
2019-04-29 17:13   ` Doug Ledford
2019-04-29 18:00     ` Leon Romanovsky [this message]
2019-04-29 18:17       ` Doug Ledford

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