From: Christoph Hellwig <hch@infradead.org>
To: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Cc: linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org,
nvdimm@lists.linux.dev, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org, djwong@kernel.org,
dan.j.williams@intel.com, david@fromorbit.com, hch@infradead.org,
jane.chu@oracle.com
Subject: Re: [PATCH v7 3/8] mm: factor helpers for memory_failure_dev_pagemap
Date: Thu, 14 Oct 2021 23:33:22 -0700 [thread overview]
Message-ID: <YWkgsrAuEybhouZy@infradead.org> (raw)
In-Reply-To: <20210924130959.2695749-4-ruansy.fnst@fujitsu.com>
On Fri, Sep 24, 2021 at 09:09:54PM +0800, Shiyang Ruan wrote:
> memory_failure_dev_pagemap code is a bit complex before introduce RMAP
> feature for fsdax. So it is needed to factor some helper functions to
> simplify these code.
>
> Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
> ---
> mm/memory-failure.c | 140 ++++++++++++++++++++++++--------------------
> 1 file changed, 76 insertions(+), 64 deletions(-)
>
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index 54879c339024..8ff9b52823c0 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -1430,6 +1430,79 @@ static int try_to_split_thp_page(struct page *page, const char *msg)
> return 0;
> }
>
> +static void unmap_and_kill(struct list_head *to_kill, unsigned long pfn,
> + struct address_space *mapping, pgoff_t index, int flags)
> +{
> + struct to_kill *tk;
> + unsigned long size = 0;
> +
> + list_for_each_entry(tk, to_kill, nd)
> + if (tk->size_shift)
> + size = max(size, 1UL << tk->size_shift);
> + if (size) {
Nit: an empty line here would be nice for readability.
> + if (pgmap->type == MEMORY_DEVICE_PRIVATE) {
> + /*
> + * TODO: Handle HMM pages which may need coordination
> + * with device-side memory.
> + */
> + return -EBUSY;
We've got rid of the HMM terminology for device private memory, so
I'd reword this update the comment to follow that while you're at it.
Otherwise looks good:
Reviewed-by: Christoph Hellwig <hch@lst.de>
next prev parent reply other threads:[~2021-10-15 6:33 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-24 13:09 [PATCH v7 0/8] [PATCH v7 0/8] fsdax: introduce fs query to support reflink Shiyang Ruan
2021-09-24 13:09 ` [PATCH v7 1/8] dax: Use rwsem for dax_{read,write}_lock() Shiyang Ruan
2021-10-14 17:48 ` Darrick J. Wong
2021-10-20 5:19 ` Shiyang Ruan
2021-10-15 6:30 ` Christoph Hellwig
2021-09-24 13:09 ` [PATCH v7 2/8] dax: Introduce holder for dax_device Shiyang Ruan
2021-10-14 18:00 ` Darrick J. Wong
2021-10-20 6:58 ` Shiyang Ruan
2021-09-24 13:09 ` [PATCH v7 3/8] mm: factor helpers for memory_failure_dev_pagemap Shiyang Ruan
2021-10-14 18:02 ` Darrick J. Wong
2021-10-15 6:33 ` Christoph Hellwig [this message]
2021-09-24 13:09 ` [PATCH v7 4/8] pagemap,pmem: Introduce ->memory_failure() Shiyang Ruan
2021-10-14 18:05 ` Darrick J. Wong
2021-10-20 5:25 ` Shiyang Ruan
2021-10-15 6:36 ` Christoph Hellwig
2021-09-24 13:09 ` [PATCH v7 5/8] fsdax: Introduce dax_lock_mapping_entry() Shiyang Ruan
2021-10-14 18:17 ` Darrick J. Wong
2021-09-24 13:09 ` [PATCH v7 6/8] mm: Introduce mf_dax_kill_procs() for fsdax case Shiyang Ruan
2021-10-14 19:32 ` Darrick J. Wong
2021-10-20 5:47 ` Shiyang Ruan
2021-09-24 13:09 ` [PATCH v7 7/8] xfs: Implement ->notify_failure() for XFS Shiyang Ruan
2021-10-14 19:21 ` Darrick J. Wong
2021-10-15 6:41 ` Christoph Hellwig
2021-09-24 13:09 ` [PATCH v7 8/8] fsdax: add exception for reflinked files Shiyang Ruan
2021-10-14 19:24 ` Darrick J. Wong
2021-10-15 6:38 ` Christoph Hellwig
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