On Tue, 2005-02-08 at 19:09 -0500, James Morris wrote: > On Wed, 9 Feb 2005, Fruhwirth Clemens wrote: > > > > You can't call kmap() in softirq context (why was it even trying?): > > > > Why not? What's the alternative, then? > > It can sleep in map_new_virtual(). > > The alternative is to use atomic kmaps. For this code, unless you can > point to something concrete in the existing kernel which would benefit > from passing an arbitrary number of scatterlists in, just code for the > case of processing two at once (input & output).
kmap_atomic doesn't qualify as alternative. It's limited to two free mappings. There must be something else to kmap in softirq. I really can't imagine such a limitation. Where is the documentation for the highmem stuff anyway? It's stunning that there is not a single useful hit in ./Documentation for kmap_atomic or kmap. The web is also close-lipped about that issue. I can't code for the case of two. Because, first, that's the idea of generic in the name "generic scatterwalk", second, I need at least 3 scatterlists in parallel for LRW. -- Fruhwirth Clemens <[EMAIL PROTECTED]> http://clemens.endorphin.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
