Thanks,
I did read the doc, but maybe I mis-understant some points. Could you please
point it out?
On Sun, Jan 01, 2017 at 08:47:12AM +0200, Leon Romanovsky wrote:
> Date: Sun, 1 Jan 2017 08:47:12 +0200
> From: Leon Romanovsky <l...@kernel.org>
> To: Kenneth Lee <liguo...@hisilicon.com>
> CC: dledf...@redhat.com, sean.he...@intel.com, hal.rosenst...@gmail.com,
> robin.mur...@arm.com, jroe...@suse.de, egtv...@samfundet.no,
> vgu...@synopsys.com, dave.han...@linux.intel.com, lstoa...@gmail.com,
> k...@kernel.org, seb...@linux.vnet.ibm.com, ma...@mellanox.com,
> linux-r...@vger.kernel.org, linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v3] IB/umem: Release pid in error and ODP flow
> User-Agent: Mutt/1.7.2 (2016-11-26)
> Message-ID: <20170101064712.GQ26885@mtr-leonro.local>
>
> On Fri, Dec 30, 2016 at 06:18:29PM +0800, Kenneth Lee wrote:
> > There are two bugfixes in this patch:
> >
> > Fixes: 87773dd56d54 ("IB: ib_umem_release() should decrement mm->pinned_vm
> > from ib_umem_get")
> > This patch introduce the get_task_pid but not put it back on all error
> > path
> >
> > Fixes: 8ada2c1c0c1d ("IB/core: Add support for on demand paging regions")
> > This patch introduce a ODP flow without release pid before enter it
> >
> >
> > Signed-off-by: Kenneth Lee <liguo...@hisilicon.com>
> > Reviewed-by: Haggai Eran <hagg...@mellanox.com>
> > ---
> > Change from v1 to v2:
> > Correcting the patch title and description
> > Change from v2 to v3:
> > Update the title and add "Fixes" fields in the description
>
> OK,
>
> I see that you still didn't read Documentation/SubmittingPatches. You
> must read that document before you are sending patches.
>
> But I'll stop here, the code is correct (it fixes bugs) and commit message
> more usefull than before.
>
>
> >
> > drivers/infiniband/core/umem.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
> > index 1e62a5f..4609b92 100644
> > --- a/drivers/infiniband/core/umem.c
> > +++ b/drivers/infiniband/core/umem.c
> > @@ -134,6 +134,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext
> > *context, unsigned long addr,
> > IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND));
> >
> > if (access & IB_ACCESS_ON_DEMAND) {
> > + put_pid(umem->pid);
> > ret = ib_umem_odp_get(context, umem);
> > if (ret) {
> > kfree(umem);
> > @@ -149,6 +150,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext
> > *context, unsigned long addr,
> >
> > page_list = (struct page **) __get_free_page(GFP_KERNEL);
> > if (!page_list) {
> > + put_pid(umem->pid);
> > kfree(umem);
> > return ERR_PTR(-ENOMEM);
> > }
> > --
> > 1.9.1
> >
> > --
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> > the body of a message to majord...@vger.kernel.org
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--
-Kenneth(Hisilicon)
