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SubjectRe: [RFC][PATCH] tracepoints: Move the work out of line from hotpath sections
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On Thu, 2012-08-09 at 16:54 -0700, David Daney wrote:
> On 08/09/2012 04:16 PM, H. Peter Anvin wrote:
> > On 08/09/2012 03:25 PM, Steven Rostedt wrote:
> >>>
> >>> It might be better to improve gcc to move really cold branches out of
> >>> line (really, really far away), and use the compiler to do this, rather
> >>> than to use an extra indirection that adds bloat and complexity to the
> >>> kernel.
>
> Oh, you mean like: -freorder-blocks-and-partition

Actually, what would be really nice is to place a block in a section of
your choice. Something like:


if (unlikely(x)) __attribute__((section(".unlikely"))) {
/* code here will be in the ".unlikely" section */
}
-- Steve




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