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authorEric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com>2007-10-17 15:31:07 -0400
committerEric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com>2007-10-17 15:31:07 -0400
commit50fd8010673b770f6489c9ee96680c204aefa84a (patch)
tree734686c1c5be427d72665f2ea63537886717f157 /fs
parentba17674fe02909fef049fd4b620a2805bdb8c693 (diff)
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 <ericvh@gmail.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/9p/vfs_file.c6
1 files 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,
162 162
163 fid = filp->private_data; 163 fid = filp->private_data;
164 ret = p9_client_uwrite(fid, data, *offset, count); 164 ret = p9_client_uwrite(fid, data, *offset, count);
165 if (ret > 0) 165 if (ret > 0) {
166 invalidate_inode_pages2_range(inode->i_mapping, *offset,
167 *offset+ret);
166 *offset += ret; 168 *offset += ret;
169 }
167 170
168 if (*offset > inode->i_size) { 171 if (*offset > inode->i_size) {
169 inode->i_size = *offset; 172 inode->i_size = *offset;
170 inode->i_blocks = (inode->i_size + 512 - 1) >> 9; 173 inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
171 } 174 }
172 175
173 invalidate_inode_pages2(inode->i_mapping);
174 return ret; 176 return ret;
175} 177}
176 178