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From: Jeff Layton <jlayton@kernel.org>
To: ceph-devel@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, dhowells@redhat.com,
	willy@infradead.org, linux-cachefs@redhat.com,
	linux-kernel@vger.kernel.org
Subject: [RFC PATCH 2/6] ceph: rework PageFsCache handling
Date: Fri, 22 Jan 2021 12:51:14 -0500	[thread overview]
Message-ID: <20210122175119.364381-3-jlayton@kernel.org> (raw)
In-Reply-To: <20210122175119.364381-1-jlayton@kernel.org>

With the new fscache API, the PageFsCache bit now indicates that the
page is being written to the cache and shouldn't be modified or released
until it's finished.

Change releasepage and invalidatepage to wait on that bit before
returning.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ceph/addr.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index e267aa60c8b6..f554667e1e91 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -166,13 +166,19 @@ static void ceph_invalidatepage(struct page *page, unsigned int offset,
 	ceph_put_snap_context(snapc);
 	page->private = 0;
 	ClearPagePrivate(page);
+	wait_on_page_fscache(page);
 }
 
-static int ceph_releasepage(struct page *page, gfp_t g)
+static int ceph_releasepage(struct page *page, gfp_t gfp_flags)
 {
 	dout("%p releasepage %p idx %lu (%sdirty)\n", page->mapping->host,
 	     page, page->index, PageDirty(page) ? "" : "not ");
 
+	if (PageFsCache(page)) {
+		if (!(gfp_flags & __GFP_DIRECT_RECLAIM) || !(gfp_flags & __GFP_FS))
+			return 0;
+		wait_on_page_fscache(page);
+	}
 	return !PagePrivate(page);
 }
 
-- 
2.29.2


  parent reply	other threads:[~2021-01-22 17:57 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-22 17:51 [RFC PATCH 0/6] ceph: convert buffered read codepaths to new netfs API Jeff Layton
2021-01-22 17:51 ` [RFC PATCH 1/6] ceph: disable old fscache readpage handling Jeff Layton
2021-01-22 17:51 ` Jeff Layton [this message]
2021-01-22 17:51 ` [RFC PATCH 3/6] ceph: fix invalidation Jeff Layton
2021-01-22 17:51 ` [RFC PATCH 4/6] ceph: convert readpage to fscache read helper Jeff Layton
2021-01-22 17:51 ` [RFC PATCH 5/6] ceph: plug write_begin into " Jeff Layton
2021-01-22 17:51 ` [RFC PATCH 6/6] ceph: convert ceph_readpages to ceph_readahead Jeff Layton

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