> All major disk or in-memory filesystems except for XFS just pass down > ATTR_*TIME requests to inode_setattr which is not more than just > dirtying the inode. NFS and CIFS set S_NOCMTIME so they're not affected > by this at all. I've checked, and relatively few filesystems set S_NOCMTIME: cifs, fuse, nfs But there are quite a few others which don't call inode_setattr (which means that the unchanged time optimization is lost), or which do something possibly slow in their ->setattr(): adfs, 9p, afs, coda, gfs2 ... just to name a few at the start of the alphabet. So it looks to me as this could cause some unintended performance regressions in these filesystems. Miklos -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
