Re: [PATCH] Ext3 online resizing locking issue

[Glauber de Oliveira Costa <gocosta@br.ibm.com>]

> 
> The two different uses of the superblock lock are really quite
> different; I don't see any particular problem with using two different
> locks for the two different things.  Mount and the namespace code are
> not locking the same thing --- the fact that the resize code uses the
> superblock lock is really a historical side-effect of the fact that we
> used to use the same overloaded superblock lock in the ext2/ext3 block
> allocation layers to guard bitmap access.
> 
> 
At a first look, i thought about locking gdt-related data. But in a
closer one, it seemed to me that we're in fact modifying a little bit
more than that in the resize code. But all these modifications seem to
be somehow related to the ext3 super block specific data in
ext3_sb_info. My first naive approach would be adding a lock to that
struct

Besides that, by doing that, we become pretty much independent of vfs
locking decisions to handle ext3 data. Do you think it all make sense?



-- 
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Glauber de Oliveira Costa
IBM Linux Technology Center - Brazil
gocosta@br.ibm.com
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