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From: Jan Kara <jack@suse.cz>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-nvdimm@lists.01.org, hch@lst.de, linux-mm@kvack.org,
	linux-fsdevel@vger.kernel.org, jack@suse.cz
Subject: Re: [PATCH v3 04/12] device-dax: Set page->index
Date: Thu, 7 Jun 2018 17:50:03 +0200	[thread overview]
Message-ID: <20180607155003.dwndud2xsnpqpcxl@quack2.suse.cz> (raw)
In-Reply-To: <152815392126.39010.6403368422475215562.stgit@dwillia2-desk3.amr.corp.intel.com>

On Mon 04-06-18 16:12:01, Dan Williams wrote:
> In support of enabling memory_failure() handling for device-dax
> mappings, set ->index to the pgoff of the page. The rmap implementation
> requires ->index to bound the search through the vma interval tree.
> 
> The ->index value is never cleared. There is no possibility for the
> page to become associated with another pgoff while the device is
> enabled. When the device is disabled the 'struct page' array for the
> device is destroyed and ->index is reinitialized to zero.
> 
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Looks good to me. You can add:

Reviewed-by: Jan Kara <jack@suse.cz>

								Honza
-- 
Jan Kara <jack@suse.com>
SUSE Labs, CR

  reply	other threads:[~2018-06-07 15:50 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-04 23:11 [PATCH v3 00/12] mm: Teach memory_failure() about ZONE_DEVICE pages Dan Williams
2018-06-04 23:11 ` [PATCH v3 01/12] device-dax: Convert to vmf_insert_mixed and vm_fault_t Dan Williams
2018-06-04 23:11 ` [PATCH v3 02/12] device-dax: Cleanup vm_fault de-reference chains Dan Williams
2018-06-04 23:11 ` [PATCH v3 03/12] device-dax: Enable page_mapping() Dan Williams
2018-06-07 15:39   ` Jan Kara
2018-06-04 23:12 ` [PATCH v3 04/12] device-dax: Set page->index Dan Williams
2018-06-07 15:50   ` Jan Kara [this message]
2018-06-04 23:12 ` [PATCH v3 05/12] filesystem-dax: " Dan Williams
2018-06-07 16:02   ` Jan Kara
2018-06-04 23:12 ` [PATCH v3 06/12] mm, madvise_inject_error: Let memory_failure() optionally take a page reference Dan Williams
2018-06-04 23:12 ` [PATCH v3 07/12] x86/mm/pat: Prepare {reserve, free}_memtype() for "decoy" addresses Dan Williams
2018-06-04 23:12 ` [PATCH v3 08/12] x86/memory_failure: Introduce {set, clear}_mce_nospec() Dan Williams
2018-06-07  4:42   ` Dan Williams
2018-06-07 17:02     ` Luck, Tony
2018-06-04 23:12 ` [PATCH v3 09/12] mm, memory_failure: Pass page size to kill_proc() Dan Williams
2018-06-04 23:12 ` [PATCH v3 10/12] mm, memory_failure: Fix page->mapping assumptions relative to the page lock Dan Williams
2018-06-04 23:12 ` [PATCH v3 11/12] mm, memory_failure: Teach memory_failure() about dev_pagemap pages Dan Williams
2018-06-07  4:22   ` Dan Williams
2018-06-07 16:30   ` Jan Kara
2018-06-07 16:45     ` Dan Williams
2018-06-04 23:12 ` [PATCH v3 12/12] libnvdimm, pmem: Restore page attributes when clearing errors Dan Williams

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