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From: David Howells <dhowells@redhat.com>
To: Trond Myklebust <trondmy@hammerspace.com>,
	Anna Schumaker <anna.schumaker@netapp.com>,
	Steve French <sfrench@samba.org>,
	Dominique Martinet <asmadeus@codewreck.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Christoph Hellwig <hch@lst.de>,
	linux-mm@kvack.org, linux-cachefs@redhat.com,
	linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org,
	linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org,
	v9fs-developer@lists.sourceforge.net,
	linux-fsdevel@vger.kernel.org, dhowells@redhat.com,
	Jeff Layton <jlayton@redhat.com>,
	David Wysochanski <dwysocha@redhat.com>,
	"Matthew Wilcox (Oracle)" <willy@infradead.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	linux-cachefs@redhat.com, linux-afs@lists.infradead.org,
	linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org,
	ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v5 02/28] mm: Add wait_on_page_writeback_killable()
Date: Tue, 23 Mar 2021 22:17:52 +0000	[thread overview]
Message-ID: <161653787287.2770958.17679186162121211209.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <161653784755.2770958.11820491619308713741.stgit@warthog.procyon.org.uk>

Add a function to wait killably on the PG_writeback page flag.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Matthew Wilcox (Oracle) <willy@infradead.org>
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Christoph Hellwig <hch@lst.de>
cc: linux-mm@kvack.org
cc: linux-cachefs@redhat.com
cc: linux-afs@lists.infradead.org
cc: linux-nfs@vger.kernel.org
cc: linux-cifs@vger.kernel.org
cc: ceph-devel@vger.kernel.org
cc: v9fs-developer@lists.sourceforge.net
cc: linux-fsdevel@vger.kernel.org
---

 include/linux/pagemap.h |    1 +
 mm/page-writeback.c     |   25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 20225b067583..444155ae56c0 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -683,6 +683,7 @@ static inline int wait_on_page_locked_killable(struct page *page)
 
 int put_and_wait_on_page_locked(struct page *page, int state);
 void wait_on_page_writeback(struct page *page);
+int wait_on_page_writeback_killable(struct page *page);
 extern void end_page_writeback(struct page *page);
 void wait_for_stable_page(struct page *page);
 
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index eb34d204d4ee..b8bad275f94b 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2833,6 +2833,31 @@ void wait_on_page_writeback(struct page *page)
 }
 EXPORT_SYMBOL_GPL(wait_on_page_writeback);
 
+/**
+ * Wait for a page to complete writeback
+ * @page: The page to wait on
+ *
+ * Wait for the writeback status of a page to clear or a fatal signal to occur.
+ *
+ * Return:
+ * - 0 on success.
+ * - -EINTR if a fatal signal was encountered.
+ */
+int wait_on_page_writeback_killable(struct page *page)
+{
+	int ret = 0;
+
+	while (PageWriteback(page)) {
+		trace_wait_on_page_writeback(page, page_mapping(page));
+		ret = wait_on_page_bit_killable(page, PG_writeback);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(wait_on_page_writeback_killable);
+
 /**
  * wait_for_stable_page() - wait for writeback to finish, if necessary.
  * @page:	The page to wait on.



  parent reply	other threads:[~2021-03-23 22:18 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-23 22:17 [PATCH v5 00/28] Network fs helper library & fscache kiocb API David Howells
2021-03-23 22:17 ` [PATCH v5 01/28] iov_iter: Add ITER_XARRAY David Howells
2021-03-23 22:17 ` David Howells [this message]
2021-03-23 22:18 ` [PATCH v5 03/28] mm: Add set/end/wait functions for PG_private_2 David Howells
2021-03-23 22:18 ` [PATCH v5 04/28] mm: Implement readahead_control pageset expansion David Howells
2021-03-23 22:18 ` [PATCH v5 05/28] netfs: Make a netfs helper module David Howells
2021-03-23 22:18 ` [PATCH v5 06/28] netfs: Documentation for helper library David Howells
2021-03-23 22:18 ` [PATCH v5 07/28] netfs, mm: Move PG_fscache helper funcs to linux/netfs.h David Howells
2021-03-23 22:18 ` [PATCH v5 08/28] netfs, mm: Add set/end/wait_on_page_fscache() aliases David Howells
2021-03-23 22:19 ` [PATCH v5 09/28] netfs: Provide readahead and readpage netfs helpers David Howells
2021-03-23 22:19 ` [PATCH v5 10/28] netfs: Add tracepoints David Howells
2021-03-23 22:19 ` [PATCH v5 11/28] netfs: Gather stats David Howells
2021-03-23 22:19 ` [PATCH v5 12/28] netfs: Add write_begin helper David Howells
2021-03-23 22:19 ` [PATCH v5 13/28] netfs: Define an interface to talk to a cache David Howells
2021-03-23 22:20 ` [PATCH v5 14/28] fscache, cachefiles: Add alternate API to use kiocb for read/write to cache David Howells
2021-03-23 22:20 ` [PATCH v5 15/28] afs: Disable use of the fscache I/O routines David Howells
2021-03-23 22:20 ` [PATCH v5 16/28] afs: Pass page into dirty region helpers to provide THP size David Howells
2021-03-23 22:20 ` [PATCH v5 17/28] afs: Print the operation debug_id when logging an unexpected data version David Howells
2021-03-23 22:21 ` [PATCH v5 18/28] afs: Move key to afs_read struct David Howells
2021-03-23 22:21 ` [PATCH v5 19/28] afs: Don't truncate iter during data fetch David Howells
2021-03-23 22:21 ` [PATCH v5 20/28] afs: Log remote unmarshalling errors David Howells
2021-03-23 22:21 ` [PATCH v5 21/28] afs: Set up the iov_iter before calling afs_extract_data() David Howells
2021-03-23 22:21 ` [PATCH v5 22/28] afs: Use ITER_XARRAY for writing David Howells
2021-03-23 22:22 ` [PATCH v5 23/28] afs: Wait on PG_fscache before modifying/releasing a page David Howells
2021-03-23 22:22 ` [PATCH v5 24/28] afs: Extract writeback extension into its own function David Howells
2021-03-23 22:22 ` [PATCH v5 25/28] afs: Prepare for use of THPs David Howells
2021-03-23 22:22 ` [PATCH v5 26/28] afs: Use the fs operation ops to handle FetchData completion David Howells
2021-03-23 22:22 ` [PATCH v5 27/28] afs: Use new fscache read helper API David Howells
2021-03-23 22:23 ` [PATCH v5 28/28] afs: Use the fscache_write_begin() helper David Howells

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