The current arch/alpha/kernel/Makefile build logic shows es1888.o built
as part of CONFIG_ALPHA_GENERIC, but if that option isn't enabled, then
enabling any of the following configuration options will cause es1888.o
to be built:
CONFIG_ALPHA_DP264
CONFIG_ALPHA_SHARK
CONFIG_ALPHA_MIATA
Interesting. I *seldom* use the Debian generic kernel. It's available,
and I install updated versions when they are released, but all of my
testing has been with kernels built from the standard kernel.org sources
with CONFIG_ALPHA_MIATA enabled.
This is consistent with what I remember you reporting when we were
looking at this back in the 2.6.14 timeframe. I was reporting the "bad
page state" problems with 2.6.22-rc6 and -rc7. In my case, the trigger
was a different application, but only happened when snd_es18xx was
loaded. Hugh Dickins suggested it was a regression introduced in
2.6.15 that I had managed to successfully avoid tripping on :-). The
analysis went something like this:
sound/isa/es18xx.c:
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, ...
led us to sound/core/memalloc.c:
res = dma_alloc_coherent(dev, PAGE_SIZE << pg, dma, gfp_flags);
where __GFP_COMP was carefully included in gfp_flags to avoid the
kinds of problems I was seeing (replacing the pre-2.6.15 use of
PageReserved).
Hugh said we could blame him or Nick for removing the special
PageReserved usage, or the Alpha for ignoring gfp_flags in the
following:
#define dma_alloc_coherent(dev, size, addr, gfp) \
pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr)
The workaround (until the official patch was issued) was a small patch
against arch/alpha/kernel/pci_iommu.c:pci_alloc_consistent() that
replaced "gfp_t gfp = GFP_ATOMIC;" with "gfp_t gfp = GFP_ATOMIC|__GFP_COMP;".
That eliminated the "bad page state" errors for me, and I don't recall
what the official patch was.
--
------------------------------------------------------------------------
Bob Tracy | "I was a beta tester for dirt. They never did
rct@frus.com | get all the bugs out." - Steve McGrew on /.
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