Re: Boot failure with ext2 and initrds

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Andrew Morton (AM) writes:

 AM> What lock protects the fields in struct ext[234]_reserve_window from being
 AM> concurrently modified by two CPUs?  None, it seems.  Ditto
 AM> ext[234]_reserve_window_node.  i_mutex will cover it for write(), but not
 AM> for pageout over a file hole.  If we end up with a zero- or negative-sized
 AM> window then odd things might happen.

truncate_mutex?

thanks, Alex