* Jan Kiszka <jan.kiszka@xxxxxxxxxxx> wrote: > Ingo Molnar pointed out that sending the timer signal to the whole > process, just blocking it everywhere, is suboptimal with an increasing > number of threads. QEMU is using this pattern so far. > > But Linux provides a (non-portable) way to restrict the signal to a > single thread: Use SIGEV_THREAD_ID unless we are forced to emulate > signalfd via an additional thread. That case could theoretically be > optimized as well, but it doesn't look worth bothering. Would be nice to mention it in the changelog that the context and motivation for my remark was a patch sent for tools/kvm/ by Asias He: kvm tools: Block SIGALRM for vcpu thread using sig_block() helper Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
