Re: Remounting as read-only

[Steven Bellovin <smb%cs.columbia.edu@localhost>]

On May 14, 2010, at 11:47 33AM, Thor Lancelot Simon wrote:

> On Fri, May 14, 2010 at 04:34:55PM +0100, Stephen Borrill wrote:
>> 
>> I think the relevant lines in the kernel should be protected by an 
>> #ifndef so that people using it aren't inconvenienced by having to 
>> maintain kernel patches.
> 
> Kernel patches which will trash their filesystems?  Why should we help
> people maintain (or "not have to be inconvenienced by maintaining")
> those?
> 
> Fix it, or leave it how it is.  That's my point of view.

Agreed.

My question, though, concerns the origin of the problem.  There's long been 
code to completely and successfully flush all metadata before unmounting a 
volume -- why does that work, when this doesn't?  

                --Steve Bellovin, http://www.cs.columbia.edu/~smb