Hi all I have written a so-called "cechkpointing" mechanism for the YAFFS2 file system that stores a snapshot of the fs structure in some spare flash. When the filesystem gets remounted, this info replaces the normal scanning process and thus significantly speeds up mounting. At this stage I have managed to attach the "checkpoint" writting to put_super so that the info is stored during a umount, but have had some problems trying to do the same with getting this to work with a sync call. I don't really want the checkpoint data to get written too often as this will slow down the fs and cause extra flashh wear. I really only want it to happen as part of an explicite sync(). I tried attaching the checkpointing to the write_super() and sync_fs() methods, but these either caused writing more often than I needed, or nothing happened because sb->s_dirt was not set. As a final twist it would be really handy for the solution to work with both 2.4 and 2.6 kernels. A lot of embedded systems still run 2.4.x. ANy pointers on how to proceed much appreciated. Thanx -- Charles - 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
