Re: Ext4 and the "30 second window of death"

[Ray Lee]

On Wed, Apr 1, 2009 at 10:43 AM, Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote:
> I've got absolutely no idea why anyone would want fsync() to stop
> meaning "Put my data on the disk please".

Some guy named Andrew used to run a kernel with 'return 0' at the top
of fsync and fdatasync: http://lkml.org/lkml/2007/4/27/88

It's that the latency penalty of apps using *sync() on common hardware
sucks. That's all, and finding a way to fix that would make this
entire thread go away, I think.
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