Re: [parisc-linux] Re: kernel>=2.6.4-rc3 hung or panic on C1[18]0 [was: 2.6.5-rc2-pa2 boot panic on c110 :(]

[Joel Soete]

James ,

Thanks to your explanation, I become to have (step by step) a more detail
idea on what I did and its borther effect. (still have to confirm by test
:^)

 
>coalescing, so our SG lists were usually lots of page sized entities. 
>Now the individual entries can be up to 256k long.


Just to be sure we spoke about the same thing:
256k for you is it well the parisc_vmerge_max_size = IOVP_SIZE * BITS_PER_LONG?

as IOVP == PAGE_SIZE == 4k and BITS_PER_LONG == 32 for a 32bits kernel, so
parisc_vmerge_max_size= 128k

and BITS_PER_LONG == 64 for 64bit kernel, so parisc_vmerge_max_size= 256k.

Thanks in advance,
    Joel

PS: btw in dma.h I found "#define DMA_CHUNK_SIZE (BITS_PER_LONG*PAGE_SIZE)";
couldn't it used in ccio-dma.c and sba-iommu.c in parisc_vmerge_max_size
assignement?

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