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Re: [Xen-devel] [PATCH] xentrace buffer alignment
I've already replied on the ia64-devel list. I'd like to know more about why explicit alignment is required.
-- Keir On 24 Nov 2005, at 12:06, Masaki Kanno wrote:
Hi, I'm working to xentrace execution on ia64 now. When the "tbuf_size=" option was added, Xen cannot be booted and show the following messages. (XEN) About to call init_trace_bufs() (XEN) Xen trace buffers: initialised(XEN) About to call schedulers_start dom0=f0000000040ec100, idle0_dom=f0000000040d2e10(XEN) ia64_handle_reflection: reflecting with priv=0!! Unaligned Reference fault occurred in trace function. This patch correct alignment of the trace buffer. Signed-off-by: Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx> Thanks, kan diff -r 51f32d60536b xen/include/public/trace.h --- a/xen/include/public/trace.h Fri Nov 18 00:35:14 2005 +++ b/xen/include/public/trace.h Thu Nov 24 20:49:02 2005 @@ -69,7 +69,7 @@unsigned int prod; /* Next item to be produced by Xen. */ unsigned int nr_recs; /* Number of records in this trace buffer. */ /* 'nr_recs' records follow immediately after the meta-data header. */-};+} __attribute__((__aligned__(8))); /* 8 bytes alignment for ia64 */#endif /* __XEN_PUBLIC_TRACE_H__ */ _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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