> Anyways, is this the end of the discussion regarding my patch?
I think one of the maintainers for usb-uhci (Georg) said he'd
want the general fix ...
> Manfred said plainly "usb-uhci is broken", Alan kinda
> manuevered around my small problem, Dave Brownell looks
> unconvinced. So?
There are two problems I see.
(1) CONFIG_SLAB_DEBUG breaks the documented
requirement that the slab cache return adequately aligned
data ... which the appended patch should probably handle
nicely (something like it sure did :-) and with less danger
than the large patch you posted.
(2) The USB host controller drivers all need something
like a pci_consistent slab cache, which doesn't currently
exist. I have something like that in the works, and David
Miller noted one driver that I may steal from.
- Dave
--- slab.c-orig Tue Mar 6 15:01:26 2001
+++ slab.c Tue Mar 6 15:05:58 2001
@@ -676,12 +676,10 @@
}
#if DEBUG
+ /* redzoning would break cache alignment requirements */
+ if (flags & SLAB_HWCACHE_ALIGN)
+ flags &= ~SLAB_RED_ZONE;
if (flags & SLAB_RED_ZONE) {
- /*
- * There is no point trying to honour cache alignment
- * when redzoning.
- */
- flags &= ~SLAB_HWCACHE_ALIGN;
size += 2*BYTES_PER_WORD; /* words for redzone */
}
#endif
-
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