Mark Fasheh wrote:
I finally got some time to sit down and implement an OCFS2 patch to make use of the ->page_mkwrite() callback added by David Howells' patch (named 'add-page_mkwrite-vm_operations-method.patch' in -mm). The patches, and an MPI program to test this can be found at: http://kernel.org/pub/linux/kernel/people/mfasheh/ocfs2/mmap/ There's one bug however, which will cause the test program on one of the reading nodes to see stale data if it is run several times in a row against the same file. I have verified that the same thing works fine on a local file system (ext3). I'm not sure where the issue is, but I have a feeling I'm doing something bad in ocfs2_data_convert_worker(). Another possibility is that we missed a place to put the ->page_mkwrite callback. Unfortunately, I have to step away from this patch for a bit as I have some higher priority issues to deal with :/ Luckily, it seems to be in a state which I think warrants it being pushed out to the public for general review, testing, etc. If anyone is interested, I'd also appreciate any advice or help regarding the bug -- my VM-foo is very weak :) --Mark
Hi Mark, While this may be a great patch, you didn't actually explain what it does, how it does it or why it does it. Regards, Daniel - 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
