From: Matthew Wilcox <willy@infradead.org>
To: Steven French <Steven.French@microsoft.com>
Cc: Kairui Song <kasong@tencent.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
"Huang, Ying" <ying.huang@intel.com>,
Chris Li <chrisl@kernel.org>, Barry Song <v-songbaohua@oppo.com>,
Ryan Roberts <ryan.roberts@arm.com>, Neil Brown <neilb@suse.de>,
Minchan Kim <minchan@kernel.org>, Hugh Dickins <hughd@google.com>,
David Hildenbrand <david@redhat.com>,
Yosry Ahmed <yosryahmed@google.com>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Namjae Jeon <linkinjeon@kernel.org>,
"Paulo Alcantara (SUSE)" <pc@manguebit.com>,
Shyam Prasad <Shyam.Prasad@microsoft.com>,
Bharath S M <bharathsm@microsoft.com>
Subject: Re: [EXTERNAL] [PATCH v3 05/12] cifs: drop usage of page_file_offset
Date: Mon, 29 Apr 2024 21:26:26 +0100 [thread overview]
Message-ID: <ZjACcpyw1BDRT0dO@casper.infradead.org> (raw)
In-Reply-To: <SA0PR21MB1898817BA920C2A45660DE65E41B2@SA0PR21MB1898.namprd21.prod.outlook.com>
On Mon, Apr 29, 2024 at 08:19:31PM +0000, Steven French wrote:
> Wouldn't this make it harder to fix the regression when swap file support was temporarily removed from cifs.ko (due to the folio migration)? I was hoping to come back to fixing swapfile support for cifs.ko in 6.10-rc (which used to pass the various xfstests for this but code got removed with folios/netfs changes).
It was neither the folio conversion nor the netfs conversion which
removed the claim of swap support from cifs, but NeilBrown's
introduction of ->swap_rw. In commit e1209d3a7a67 he claims that
Only two filesystems set SWP_FS_OPS:
- cifs sets the flag, but ->direct_IO always fails so swap cannot work.
- nfs sets the flag, but ->direct_IO calls generic_write_checks()
which has failed on swap files for several releases.
As I recall the xfstests only checked that swapon/swapoff works; they
don't actually test that writing to swap and reading back from it work.
next prev parent reply other threads:[~2024-04-29 20:26 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 19:04 [PATCH v3 00/12] mm/swap: clean up and optimize swap cache index Kairui Song
2024-04-29 19:04 ` [PATCH v3 01/12] f2fs: drop usage of page_index Kairui Song
2024-04-29 19:04 ` [PATCH v3 02/12] nilfs2: " Kairui Song
2024-04-29 19:14 ` Matthew Wilcox
2024-04-29 19:22 ` Kairui Song
2024-04-29 19:28 ` Ryusuke Konishi
2024-04-29 19:38 ` Matthew Wilcox
2024-04-29 20:01 ` Ryusuke Konishi
2024-04-30 15:27 ` Kairui Song
2024-04-29 19:04 ` [PATCH v3 03/12] ceph: " Kairui Song
2024-04-29 19:04 ` [PATCH v3 04/12] NFS: remove nfs_page_lengthg and " Kairui Song
2024-04-29 19:04 ` [PATCH v3 05/12] cifs: drop usage of page_file_offset Kairui Song
2024-04-29 20:19 ` [EXTERNAL] " Steven French
2024-04-29 20:26 ` Matthew Wilcox [this message]
2024-04-30 2:23 ` Steven French
2024-04-30 15:40 ` Kairui Song
2024-04-29 19:04 ` [PATCH v3 07/12] netfs: drop usage of folio_file_pos Kairui Song
2024-04-29 19:11 ` [PATCH v3 08/12] nfs: " Kairui Song
2024-04-29 19:21 ` Matthew Wilcox
2024-04-29 19:42 ` Kairui Song
2024-04-29 19:11 ` [PATCH v3 09/12] mm/swap: get the swap file offset directly Kairui Song
2024-04-29 19:11 ` [PATCH v3 10/12] mm: remove page_file_offset and folio_file_pos Kairui Song
2024-04-29 19:11 ` [PATCH v3 11/12] mm: drop page_index and convert folio_index to use folio Kairui Song
2024-04-29 19:11 ` [PATCH v3 12/12] mm/swap: reduce swap cache search space Kairui Song
2024-04-30 2:45 ` [PATCH v3 00/12] mm/swap: clean up and optimize swap cache index Huang, Ying
2024-04-30 15:27 ` Kairui Song
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