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Re: CVS commit: src/sys/arch/sparc64/dev
>>> matthew green <mrg%eterna.com.au@localhost> wrote
> Module Name: src
> Committed By: nakayama
> Date: Mon Dec 7 11:14:27 UTC 2009
> Modified Files:
> src/sys/arch/sparc64/dev: iommu.c
> Log Message:
> Avoid use of iommu_dvmamap_unload in error path. It is too
> expensive since it contains data cache flushing.
> Some driver (tlp(4) with DM9201 on Netra X1) can only handle one
> DMA segment, so it was called frequently.
> + /* How can this fail? And if it does what can we do? */
> + err = extent_free(is->is_dvmamap, map->_dm_dvmastart, sgsize,
> + EX_NOWAIT);
> this can fail almost any time. it happens when there is no free
> memory and to free a chunk would require to split a current extent
> range into two.
Ah, OK. I added the warning printf as well as what we do in
-- Takeshi Nakayama
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