Messages in this thread | | | Subject | Re: [PATCH] ext3 barrier bits | From | Chris Mason <> | Date | Sat, 22 May 2004 15:15:32 -0400 |
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On Sat, 2004-05-22 at 04:33, Andrew Morton wrote: > Arjan van de Ven <arjanv@redhat.com> wrote: > > > > > > > - Does the kernel tell you if your disk doesn't supoprt barriers? ie: > > > how does the user know if it's working or not? > > > > ... and how do you know your disk isn't lying and ignoring the barriers? > > > > If some benchmark slows down when barriers are enabled then that's a pretty > good indicator. I don't know what benchmark that might be though.
synctest -t 20 -n 1 -f dir, should show a performance hit when barriers are on.
-chris
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