Re: [PATCH v5 2/4] printk/nmi: warn when some message has been lost in NMI context
From: Russell King - ARM Linux <hidden>
Date: 2016-04-27 09:35:06
Also in:
linux-arm-kernel, linux-mips, linux-sh, lkml, sparclinux
On Thu, Apr 21, 2016 at 01:48:43PM +0200, Petr Mladek wrote:
quoted hunk ↗ jump to hunk
@@ -64,8 +65,10 @@ static int vprintk_nmi(const char *fmt, va_list args) again: len = atomic_read(&s->len); - if (len >= sizeof(s->buffer)) + if (len >= sizeof(s->buffer)) { + atomic_inc(&nmi_message_lost);
This should be fine - I think its reasonable to expect that no one is using a spinlock implementation for their atomic ops for this... -- RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.