Re: [PATCH] async: Don't call async_synchronize_full_special()while holding sb_lock

From: Alan Cox
Date: Thu Jan 08 2009 - 19:33:42 EST


On Thu, 08 Jan 2009 14:51:52 -0800
Arjan van de Ven <arjan@xxxxxxxxxxxxxxx> wrote:

> Dave Chinner wrote:
> > On Thu, Jan 08, 2009 at 09:46:31AM -0600, Dave Kleikamp wrote:
> >> sync_filesystems() shouldn't be calling async_synchronize_full_special
> >> while holding a spinlock. The second while loop in that function is the
> >> right place for this anyway.
> >
> > Out of curiousity, what on earth does
> > async_synchronize_full_special() do and why does it need to be in
> > sync_filesystems()?
> >
> now that we have asynchronous operations, this function makes sure that all the functions
> that we started async before this point complete, so that what when you sync, you sync all in progress work.

So why is it special - wouldn't async_synchronize_all() be a bit (or
complete_all) be a bit more clear ?

Alan
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