Messages in this thread | | | Subject | Re: [PATCH 2/5] ide: kill ide_toggle_bounce | From | Jens Axboe <> | Date | Thu, 26 Apr 2018 09:11:21 -0600 |
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On 4/26/18 1:20 AM, Christoph Hellwig wrote: > On Tue, Apr 24, 2018 at 08:02:56PM -0600, Jens Axboe wrote: >> On 4/24/18 12:16 PM, Christoph Hellwig wrote: >>> ide_toggle_bounce did select various strange block bounce limits, including >>> not bouncing at all as soon as an iommu is present in the system. Given >>> that the dma_map routines now handle any required bounce buffering except >>> for ISA DMA, and the ide code already must handle either ISA DMA or highmem >>> at least for iommu equipped systems we can get rid of the block layer >>> bounce limit setting entirely. >> >> Pretty sure I was the one to add this code, when highmem page IO was >> enabled about two decades ago... >> >> Outside of DMA, the issue was that the PIO code could not handle >> highmem. That's not the case anymore, so this should be fine. > > Yes, that is the rationale. Any chance to you could look over the > other patches as well? Except for the networking one for which I'd > really like to see a review from Dave all the users of the interface > are block related.
You can add my reviewed-by to 1-3, and 5. Looks good to me.
-- Jens Axboe
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