On Wed, Sep 9, 2015 at 4:29 AM, Baoquan He <b...@redhat.com> wrote: > > Seems it happened when call num_possible_cpus() which is a inline > function to call __bitmap_weight(). So did you check > lib/bitmap.c:__bitmap_weight() by objdump? > > setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:1 nr_node_ids:1 >
[ CC->TO Denys ] Hi Boaquan, Thanks for your reply. I tried a lot in the meantime :-). For example I applied a patch from Denys Vlasenko <dvlas...@redhat.com>... commit 1a1d48a4a8fde49aedc045d894efe67173d59fe0 "linux/bitmap: Force inlining of bitmap weight functions" ...on top of Linux v4.2. This resulted in the same call-trace in QEMU. I hacked around to only re-build mm/percpu.c with GCC (rest with CLANG) with some guidance from Linus (compiler warapper-script) etc. What do you need for outputs? objdump of lib/bitmap.o? >From both builds - with GCC and CLANG? Please give me clear instructions, Thanks! Regards, - Sedat - [1] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1a1d48a4a8fde49aedc045d894efe67173d59fe0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/