Re: o_sync in vfat driver

[OGAWA Hirofumi]

Chris Mason <mason@xxxxxxxx> writes:

> Ok, I thought you were asking about the code that called filemap_fdatawrite, 
> which does wait.  filemap_flush is used on the underlying block device.  In 
> the case of a page that is already under IO, the io is not cancelled but 
> allowed to continue.
>
> This is the desired result.  When you're doing a number of operations in 
> sequence, each operation will start io on the block device.  If they used 
> filemap_fdatawrite instead of filemap_flush, they would end up being 
> synchronous.

Of course, I know. Let's return to beginning of this thread, do you have
any plan to address it?
-- 
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
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