Ceph

Ted writes on ML:

BTW, this might be a good time to report a tiny little problem which I
found.  If the journal file doesn't exist, then when you run mkcephfs,
cosd will attempt to create the file for you.  But it creates it as a
4k file, and then it loops forever in FileJournal::wrap_read_bl() on
line 808, because get_top() and and header.max_size are both 4096, and
it results in it being an expensive while (1) loop.  This completely
stalls the mkcephfs operation, and it took me a while to debug.

It might be nice if cosd either (a) failed completely if the journal
file is missing, or too small, or (b) if cosd is started in mkfs mode,
and the journal file does not exist, perhaps it should create a
journal file with some suitable default size.

For stuff like this, I assume the right thing to do is to just open a
bug in tracker.newdream.net?  Is there any project-specific customs I
should be aware of?