tons of "Warning - running *really* short on DMA buffers" messages - 2.4.19, aic7xxx

tons of "Warning - running *really* short on DMA buffers" messages - 2.4.19, aic7xxx

Post by Neulinger, Natha » Fri, 27 Sep 2002 02:30:10



Is there anything that can be done about these? Running 2.4.19 on a
piii-800, 512MB, scsi hardware raid.

Seeing tons of these messages (flooding syslogs) whenever I do much I/O
to the drives.

Is there any vm tuning that can be done?

-- Nathan

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tons of "Warning - running *really* short on DMA buffers" messages - 2.4.19, aic7xxx

Post by Jens Axbo » Fri, 27 Sep 2002 02:30:11



> Is there anything that can be done about these? Running 2.4.19 on a
> piii-800, 512MB, scsi hardware raid.

> Seeing tons of these messages (flooding syslogs) whenever I do much I/O
> to the drives.

> Is there any vm tuning that can be done?

These are "fixed" in 2.4.20-pre so you should try that, if for nothing
else than testing that it works well. The old setup is just fragile.

--
Jens Axboe

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1. PROBLEM: nfs & "Warning - running *really* short on DMA buffers"

They are warnings not fatal, at most they slowed you down due to lack of
resources. You might want to tune the vm settings to keep more pages
reserved for atomic allocation

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