From: John Hubbard <jhubbard@nvidia.com>
To: Jerome Glisse <jglisse@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, <linux-mm@kvack.org>,
"Jason Gunthorpe" <jgg@ziepe.ca>,
LKML <linux-kernel@vger.kernel.org>, <linux-rdma@vger.kernel.org>,
<linux-fsdevel@vger.kernel.org>,
Doug Ledford <dledford@redhat.com>,
Mike Marciniszyn <mike.marciniszyn@intel.com>,
"Dennis Dalessandro" <dennis.dalessandro@intel.com>,
Christian Benvenuti <benve@cisco.com>, Jan Kara <jack@suse.cz>,
Jason Gunthorpe <jgg@mellanox.com>,
Ira Weiny <ira.weiny@intel.com>
Subject: Re: [PATCH 1/1] infiniband/mm: convert put_page() to put_user_page*()
Date: Thu, 23 May 2019 10:56:56 -0700 [thread overview]
Message-ID: <708b9fc4-9afd-345e-83f7-2ceae673a4fd@nvidia.com> (raw)
In-Reply-To: <20190523153133.GB5104@redhat.com>
On 5/23/19 8:31 AM, Jerome Glisse wrote:
[...]
>
> Reviewed-by: Jérôme Glisse <jglisse@redhat.com>
>
Thanks for the review!
> Between i have a wishlist see below
[...]
>> diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
>> index e7ea819fcb11..673f0d240b3e 100644
>> --- a/drivers/infiniband/core/umem.c
>> +++ b/drivers/infiniband/core/umem.c
>> @@ -54,9 +54,10 @@ static void __ib_umem_release(struct ib_device *dev, struct ib_umem *umem, int d
>>
>> for_each_sg_page(umem->sg_head.sgl, &sg_iter, umem->sg_nents, 0) {
>> page = sg_page_iter_page(&sg_iter);
>> - if (!PageDirty(page) && umem->writable && dirty)
>> - set_page_dirty_lock(page);
>> - put_page(page);
>> + if (umem->writable && dirty)
>> + put_user_pages_dirty_lock(&page, 1);
>> + else
>> + put_user_page(page);
>
> Can we get a put_user_page_dirty(struct page 8*pages, bool dirty, npages) ?
>
> It is a common pattern that we might have to conditionaly dirty the pages
> and i feel it would look cleaner if we could move the branch within the
> put_user_page*() function.
>
This sounds reasonable to me, do others have a preference on this? Last time
we discussed it, I recall there was interest in trying to handle the sg lists,
which was where a lot of focus was. I'm not sure if there was a preference one
way or the other, on adding more of these helpers.
thanks,
--
John Hubbard
NVIDIA
next prev parent reply other threads:[~2019-05-23 17:57 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-23 7:25 [PATCH 0/1] infiniband/mm: convert put_page() to put_user_page*() john.hubbard
2019-05-23 7:25 ` [PATCH 1/1] " john.hubbard
2019-05-23 15:31 ` Jerome Glisse
2019-05-23 17:56 ` John Hubbard [this message]
2019-05-23 17:28 ` Ira Weiny
2019-05-23 17:32 ` Jason Gunthorpe
2019-05-23 17:46 ` John Hubbard
2019-05-23 19:04 ` Ira Weiny
2019-05-23 19:13 ` John Hubbard
2019-05-23 22:37 ` Ira Weiny
2019-05-23 22:50 ` John Hubbard
2019-05-23 22:54 ` John Hubbard
2019-05-23 19:17 ` Jason Gunthorpe
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