On Sat, 8 Sep 2012 17:47:54 -0300 Ezequiel Garcia <[email protected]> wrote:
> Previously the strndup_user allocation was being done through memdup_user, > and the caller was wrongly traced as being strndup_user > (the correct trace must report the caller of strndup_user). > > This is a common problem: in order to get accurate callsite tracing, > a utils function can't allocate through another utils function, > but instead do the allocation himself (or inlined). > > Here we fix this by creating an always inlined dup_user() function to > performed the real allocation and to be used by memdup_user and strndup_user. This patch increases util.o's text size by 238 bytes. A larger kernel with a worsened cache footprint. And we did this to get marginally improved tracing output? This sounds like a bad tradeoff to me. -- 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/
