Messages in this thread | | | Date | Fri, 15 Feb 2002 09:24:36 -0800 | From | Simon Kirby <> | Subject | Re: fsync delays for a long time. |
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On Thu, Feb 14, 2002 at 12:51:14PM -0800, Andrew Morton wrote:
> Alan Cox wrote: > > > > > 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 > > This could very well be due to request allocation starvation. > fsync is sleeping in __get_request_wait() while bonnie keeps > on stealing all the requests. > > Recall that patch you dropped on Tuesday? :)
Not sure if this is related, but I still can't get 2.4 or 2.5 kernels to actually read and write at the same time during a large file copy between two totally separate devices (eg: from hda1 to hdc1). "vmstat 1" shows reads with no writing for about 6-8 seconds followed by writes with no reading for about 5-6 seconds, repeat.
Is there a patch available that could fix this?
Simon-
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