Re: fsync delays for a long time.

[Alan Cox]

> run my gdbm application and bonnie test on the same device.
> When gdbm comes to the point when it calls fsync it delays for a long
> time.

fsync on a very large file is very slow on the 2.2 kernels

> result. IDE is even worse in our case. In the discussion it was also said
> that fsync for 2.4.x is modified. But does it fix a problem?

2.4 is a lot smarter about flushing only the things it needs to. That
makes it dependant on the number of blocks to write not some embarrasingly
large power of the file size