Messages in this thread |  | | Date | Mon, 21 Dec 2015 18:59:44 -0900 | From | Kent Overstreet <> | Subject | Re: IO errors after "block: remove bio_get_nr_vecs()" |
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On Mon, Dec 21, 2015 at 04:08:11PM -0500, Tejun Heo wrote:
reproduced it with 32 bit pae:
> 1. Exclude memory above 4G line with boot param "max_addr=4G".
doesn't work - max_addr=1G doesn't work either
> 2. Disable highmem with "highmem=0".
works!
> 3. Try booting 64bit kernel.
works
Ok, so maybe it actually is PAE specific... but like you noted the block layer works entirely in terms of pages so...
The one idea I can think of is - maybe BIOVEC_PHYS_MERGEABLE() is broken in PAE mode? I am unfamiliar with anything PAE though.
Where does the ahci code consume the sglist?
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