From 50fd8010673b770f6489c9ee96680c204aefa84a Mon Sep 17 00:00:00 2001 From: Eric Van Hensbergen Date: Wed, 17 Oct 2007 14:31:07 -0500 Subject: [PATCH] 9p: soften invalidation in loose_mode Loose mode in 9p utilizes the page cache without respecting coherency with the server. Any writes previously invaldiated the entire mapping for a file. This patch softens the behavior to only invalidate the region of the actual write. Signed-off-by: Eric Van Hensbergen --- fs/9p/vfs_file.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 716691689fd5..ba4b1caa9c43 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -162,15 +162,17 @@ v9fs_file_write(struct file *filp, const char __user * data, fid = filp->private_data; ret = p9_client_uwrite(fid, data, *offset, count); - if (ret > 0) + if (ret > 0) { + invalidate_inode_pages2_range(inode->i_mapping, *offset, + *offset+ret); *offset += ret; + } if (*offset > inode->i_size) { inode->i_size = *offset; inode->i_blocks = (inode->i_size + 512 - 1) >> 9; } - invalidate_inode_pages2(inode->i_mapping); return ret; }