From: Jason Gunthorpe <jgg@nvidia.com>
To: peterx@redhat.com
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
SeongJae Park <sj@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Mike Rapoport <rppt@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
kernel test robot <lkp@intel.com>
Subject: Re: [PATCH] mm/arch: Provide pud_pfn() fallback
Date: Mon, 25 Mar 2024 10:05:30 -0300 [thread overview]
Message-ID: <20240325130530.GA6245@nvidia.com> (raw)
In-Reply-To: <20240323151643.1047281-1-peterx@redhat.com>
On Sat, Mar 23, 2024 at 11:16:43AM -0400, peterx@redhat.com wrote:
> From: Peter Xu <peterx@redhat.com>
>
> The comment in the code explains the reasons. We took a different approach
> comparing to pmd_pfn() by providing a fallback function.
>
> Another option is to provide some lower level config options (compare to
> HUGETLB_PAGE or THP) to identify which layer an arch can support for such
> huge mappings. However that can be an overkill.
>
> Cc: Mike Rapoport (IBM) <rppt@kernel.org>
> Cc: Matthew Wilcox <willy@infradead.org>
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202403231529.HRev1zcD-lkp@intel.com/
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2024-03-25 13:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-23 15:16 [PATCH] mm/arch: Provide pud_pfn() fallback peterx
2024-03-23 17:39 ` Peter Xu
2024-03-25 13:05 ` Jason Gunthorpe [this message]
2024-03-26 20:27 ` Andrew Morton
2024-03-26 20:43 ` Peter Xu
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