Messages in this thread | | | Date | Fri, 19 Sep 2003 09:57:36 -0700 | From | Andrew Morton <> | Subject | Re: use O_DIRECT open file, when read will hang. |
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Badari Pulavarty <pbadari@us.ibm.com> wrote: > > I am also seeing some kind of regression on raw in 2.6.0-test5-mm2.
What is "some kind of regression"?
> Unfortunately, this happens only with huge database benchmarks. > I still haven't narrowed it down.
Use mm3 - it has fixes. Daniel McNeil reports that mm3 fixes the dbt2 problems he was seeing.
> > - can I do fsx, rawiobench on NFS files to test DIO on NFS ?
Probably, but it will deadlock immediately.
All the i_sem and i_alloc_sem rework needs to be pushed down to the blockdev_direct_IO level. That means reverting O_DIRECT-race-fixes-fixes-2.patch first.
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