On Tue, 15 Jan 2013 15:46:10 -0600 Nathan Zimmer <[email protected]> wrote:
> On systems with 4096 cores attemping to read /proc/sched_debug fails. > We are trying to push all the data into a single kmalloc buffer. > The issue is on these very large machines all the data will not fit in 4mb. > > A better solution is to not us the single_open mechanism but to provide > our own seq_operations and treat each cpu as an individual record. > > The output should be identical to previous version. > > ... > > + int cpu = (unsigned long)(v - 2); Again, the meaning of the magic offsets are unobvious to readers of this code. > - SEQ_printf(m, "\n"); > + if (cpu != -1) > + print_cpu(m, cpu); Same concerns with cpu hotplug. > + else > + sched_debug_header(m); > > return 0; > } -- 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/
