From: Mike Kravetz <mike.kravetz@oracle.com>
To: Jason Gunthorpe <jgg@ziepe.ca>,
"Longpeng (Mike,
Cloud Infrastructure Service Product Dept.)"
<longpeng2@huawei.com>
Cc: akpm@linux-foundation.org, kirill.shutemov@linux.intel.com,
linux-kernel@vger.kernel.org, arei.gonglei@huawei.com,
weidong.huang@huawei.com, weifuqiang@huawei.com,
kvm@vger.kernel.org, linux-mm@kvack.org,
Matthew Wilcox <willy@infradead.org>,
Sean Christopherson <sean.j.christopherson@intel.com>,
stable@vger.kernel.org
Subject: Re: [PATCH v2] mm/hugetlb: fix a addressing exception caused by huge_pte_offset()
Date: Tue, 24 Mar 2020 08:25:09 -0700 [thread overview]
Message-ID: <98d35563-8af0-2693-7e76-e6435da0bbee@oracle.com> (raw)
In-Reply-To: <20200324115541.GH20941@ziepe.ca>
On 3/24/20 4:55 AM, Jason Gunthorpe wrote:
> Also, since CH moved all the get_user_pages_fast code out of the
> arch's many/all archs can drop their arch specific version of this
> routine. This is really just a specialized version of gup_fast's
> algorithm..
>
> (also the arch versions seem different, why do some return actual
> ptes, not null?)
Not sure I understand that last question. The return value should be
a *pte or null.
/*
* huge_pte_offset() - Walk the page table to resolve the hugepage
* entry at address @addr
*
* Return: Pointer to page table or swap entry (PUD or PMD) for
* address @addr, or NULL if a p*d_none() entry is encountered and the
* size @sz doesn't match the hugepage size at this level of the page
* table.
*/
--
Mike Kravetz
next prev parent reply other threads:[~2020-03-24 15:25 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-22 3:33 [PATCH v2] mm/hugetlb: fix a addressing exception caused by huge_pte_offset() Longpeng(Mike)
2020-03-21 23:38 ` Mike Kravetz
2020-03-23 2:03 ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2020-03-23 2:54 ` Mike Kravetz
2020-03-23 3:43 ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2020-03-23 14:40 ` Sean Christopherson
2020-03-23 16:44 ` Jason Gunthorpe
2020-03-23 16:09 ` Jason Gunthorpe
2020-03-23 17:27 ` Mike Kravetz
2020-03-23 18:07 ` Jason Gunthorpe
2020-03-23 20:35 ` Mike Kravetz
2020-03-23 22:52 ` Jason Gunthorpe
2020-03-24 2:37 ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2020-03-24 11:55 ` Jason Gunthorpe
2020-03-24 15:25 ` Mike Kravetz [this message]
2020-03-24 15:55 ` Jason Gunthorpe
2020-03-24 16:19 ` Mike Kravetz
2020-03-24 17:59 ` Jason Gunthorpe
2020-03-24 19:47 ` Mike Kravetz
2020-02-22 5:23 Qian Cai
2020-02-22 6:33 ` Longpeng (Mike)
2020-02-22 11:50 ` Qian Cai
2020-02-22 17:02 ` Matthew Wilcox
2020-02-23 1:24 ` Longpeng (Mike)
2020-02-27 21:41 ` Mike Kravetz
2020-03-21 22:46 ` Andrew Morton
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