From: Jan Kara <jack@suse.cz>
To: Jeff Layton <jlayton@redhat.com>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org,
linux-mm@kvack.org, jfs-discussion@lists.sourceforge.net,
linux-xfs@vger.kernel.org, cluster-devel@redhat.com,
linux-f2fs-devel@lists.sourceforge.net,
v9fs-developer@lists.sourceforge.net,
linux-nilfs@vger.kernel.org, linux-block@vger.kernel.org,
dhowells@redhat.com, akpm@linux-foundation.org,
hch@infradead.org, ross.zwisler@linux.intel.com,
mawilcox@microsoft.com, jack@suse.com, viro@zeniv.linux.org.uk,
corbet@lwn.net, neilb@suse.de, clm@fb.com, tytso@mit.edu,
axboe@kernel.dk, josef@toxicpanda.com, hubcap@omnibond.com,
rpeterso@redhat.com, bo.li.liu@oracle.com
Subject: Re: [PATCH v4 21/27] mm: clean up error handling in write_one_page
Date: Mon, 15 May 2017 14:01:14 +0200 [thread overview]
Message-ID: <20170515120114.GF16182@quack2.suse.cz> (raw)
In-Reply-To: <20170509154930.29524-22-jlayton@redhat.com>
On Tue 09-05-17 11:49:24, Jeff Layton wrote:
> Don't try to check PageError since that's potentially racy and not
> necessarily going to be set after writepage errors out.
>
> Instead, sample the mapping error early on, and use that value to tell
> us whether we got a writeback error since then.
>
> Signed-off-by: Jeff Layton <jlayton@redhat.com>
Looks good to me. You can add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
> ---
> mm/page-writeback.c | 11 +++++------
> 1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/mm/page-writeback.c b/mm/page-writeback.c
> index de0dbf12e2c1..1643456881b4 100644
> --- a/mm/page-writeback.c
> +++ b/mm/page-writeback.c
> @@ -2373,11 +2373,12 @@ int do_writepages(struct address_space *mapping, struct writeback_control *wbc)
> int write_one_page(struct page *page)
> {
> struct address_space *mapping = page->mapping;
> - int ret = 0;
> + int ret = 0, ret2;
> struct writeback_control wbc = {
> .sync_mode = WB_SYNC_ALL,
> .nr_to_write = 1,
> };
> + errseq_t since = filemap_sample_wb_error(mapping);
>
> BUG_ON(!PageLocked(page));
>
> @@ -2386,16 +2387,14 @@ int write_one_page(struct page *page)
> if (clear_page_dirty_for_io(page)) {
> get_page(page);
> ret = mapping->a_ops->writepage(page, &wbc);
> - if (ret == 0) {
> + if (ret == 0)
> wait_on_page_writeback(page);
> - if (PageError(page))
> - ret = -EIO;
> - }
> put_page(page);
> } else {
> unlock_page(page);
> }
> - return ret;
> + ret2 = filemap_check_wb_error(mapping, since);
> + return ret ? : ret2;
> }
> EXPORT_SYMBOL(write_one_page);
>
> --
> 2.9.3
>
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2017-05-15 12:01 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-09 15:49 [PATCH v4 00/27] fs: introduce new writeback error reporting and convert existing API as a wrapper around it Jeff Layton
2017-05-09 15:49 ` [PATCH v4 01/27] fs: remove unneeded forward definition of mm_struct from fs.h Jeff Layton
2017-05-10 11:04 ` Jan Kara
2017-05-09 15:49 ` [PATCH v4 02/27] mm: drop "wait" parameter from write_one_page Jeff Layton
2017-05-09 15:49 ` [PATCH v4 03/27] mm: fix mapping_set_error call in me_pagecache_dirty Jeff Layton
2017-05-09 15:49 ` [PATCH v4 04/27] buffer: use mapping_set_error instead of setting the flag Jeff Layton
2017-05-09 15:49 ` [PATCH v4 05/27] btrfs: btrfs_wait_tree_block_writeback can be void return Jeff Layton
2017-05-10 11:09 ` Jan Kara
2017-05-19 4:07 ` Liu Bo
2017-05-09 15:49 ` [PATCH v4 06/27] fs: check for writeback errors after syncing out buffers in generic_file_fsync Jeff Layton
2017-05-10 12:48 ` Matthew Wilcox
2017-05-09 15:49 ` [PATCH v4 07/27] orangefs: don't call filemap_write_and_wait from fsync Jeff Layton
2017-05-09 15:49 ` [PATCH v4 08/27] dax: set errors in mapping when writeback fails Jeff Layton
2017-05-09 15:49 ` [PATCH v4 09/27] nilfs2: set the mapping error when calling SetPageError on writeback Jeff Layton
2017-05-09 15:49 ` [PATCH v4 10/27] 9p: set mapping error when writeback fails in launder_page Jeff Layton
2017-05-09 15:49 ` [PATCH v4 11/27] fuse: set mapping error in writepage_locked when it fails Jeff Layton
2017-05-10 11:13 ` Jan Kara
2017-05-09 15:49 ` [PATCH v4 12/27] cifs: set mapping error when page writeback fails in writepage or launder_pages Jeff Layton
2017-05-10 11:14 ` Jan Kara
2017-05-09 15:49 ` [PATCH v4 13/27] lib: add errseq_t type and infrastructure for handling it Jeff Layton
2017-05-09 22:03 ` NeilBrown
2017-05-10 11:29 ` Jeff Layton
2017-05-10 11:34 ` Jan Kara
2017-05-10 11:58 ` Jeff Layton
2017-05-10 14:18 ` Matthew Wilcox
2017-05-10 14:56 ` Jeff Layton
2017-05-09 15:49 ` [PATCH v4 14/27] fs: new infrastructure for writeback error handling and reporting Jeff Layton
2017-05-10 11:48 ` Jan Kara
2017-05-10 12:19 ` Jeff Layton
2017-05-10 13:46 ` Jan Kara
2017-05-09 15:49 ` [PATCH v4 15/27] fs: retrofit old error reporting API onto new infrastructure Jeff Layton
2017-05-15 10:42 ` Jan Kara
2017-05-15 17:58 ` Jeff Layton
2017-05-19 19:20 ` Jeff Layton
2017-05-22 13:38 ` Jan Kara
2017-05-22 13:53 ` Jeff Layton
2017-05-22 17:53 ` Jan Kara
2017-05-22 19:09 ` Jeff Layton
2017-05-23 9:05 ` Jan Kara
2017-05-09 15:49 ` [PATCH v4 16/27] fs: adapt sync_file_range to new reporting infrastructure Jeff Layton
2017-05-09 15:49 ` [PATCH v4 17/27] mm: remove AS_EIO and AS_ENOSPC flags Jeff Layton
2017-05-09 15:49 ` [PATCH v4 18/27] mm: don't TestClearPageError in __filemap_fdatawait_range Jeff Layton
2017-05-09 15:49 ` [PATCH v4 19/27] buffer: set errors in mapping at the time that the error occurs Jeff Layton
2017-05-15 11:53 ` Jan Kara
2017-05-09 15:49 ` [PATCH v4 20/27] cifs: cleanup writeback handling errors and comments Jeff Layton
2017-05-09 15:49 ` [PATCH v4 21/27] mm: clean up error handling in write_one_page Jeff Layton
2017-05-15 12:01 ` Jan Kara [this message]
2017-05-09 15:49 ` [PATCH v4 22/27] jbd2: don't reset error in journal_finish_inode_data_buffers Jeff Layton
2017-05-15 11:58 ` Jan Kara
2017-05-09 15:49 ` [PATCH v4 23/27] gfs2: clean up some filemap_* calls Jeff Layton
2017-05-10 16:18 ` Bob Peterson
2017-05-09 15:49 ` [PATCH v4 24/27][RFC] nfs: convert to new errseq_t based error tracking for writeback errors Jeff Layton
2017-05-09 15:49 ` [PATCH v4 25/27] Documentation: flesh out the section in vfs.txt on storing and reporting " Jeff Layton
2017-05-09 16:24 ` Jeff Layton
2017-05-09 15:49 ` [PATCH v4 26/27] mm: flesh out comments over mapping_set_error Jeff Layton
2017-05-09 15:49 ` [PATCH v4 27/27] mm: clean up comments in me_pagecache_dirty Jeff Layton
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