Lars Noschinski <[EMAIL PROTECTED]> writes: > For an university project, we had to write a toy filesystem (ext2-like), > for which I would like to implement sparse file support. For this, I > digged through the ext2 source code; but I could not find the point, > where ext2 detects holes. > > As far as I can see from fs/buffer.c, an hole is a buffer_head which is > not mapped, but uptodate. But I cannot find a relevant source line, > where ext2 makes usage of this information.
It does not explicitely detect holes; holey data is just never written so no space for it is allocated. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
