Messages in this thread Patch in this message | | | From | "Matthew Wilcox (Oracle)" <> | Subject | [PATCH 02/13] 9p: Tell the VFS that readpage was synchronous | Date | Thu, 17 Sep 2020 16:10:39 +0100 |
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The 9p readpage implementation was already synchronous, so use AOP_UPDATED_PAGE to avoid cycling the page lock.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- fs/9p/vfs_addr.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index cce9ace651a2..506ca0ba2ec7 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -65,7 +65,7 @@ static int v9fs_fid_readpage(void *data, struct page *page) SetPageUptodate(page); v9fs_readpage_to_fscache(inode, page); - retval = 0; + return AOP_UPDATED_PAGE; done: unlock_page(page); @@ -280,6 +280,10 @@ static int v9fs_write_begin(struct file *filp, struct address_space *mapping, goto out; retval = v9fs_fid_readpage(v9inode->writeback_fid, page); + if (retval == AOP_UPDATED_PAGE) { + retval = 0; + goto out; + } put_page(page); if (!retval) goto start; -- 2.28.0
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