From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
alan@lxorguk.ukuu.org.uk, Jiri Slaby <jirislaby@gmail.com>,
Alan Cox <alan@linux.intel.com>, Ram Gupta <ram.gupta5@gmail.com>
Subject: [ 08/15] serial: 8250, increase PASS_LIMIT
Date: Thu, 24 Jan 2013 13:18:32 -0800 [thread overview]
Message-ID: <20130124211726.749523382@linuxfoundation.org> (raw)
In-Reply-To: <20130124211723.489089115@linuxfoundation.org>
3.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jiri Slaby <jirislaby@gmail.com>
commit e7328ae1848966181a7ac47e8ae6cddbd2cf55f3 upstream.
With virtual machines like qemu, it's pretty common to see "too much
work for irq4" messages nowadays. This happens when a bunch of output
is printed on the emulated serial console. This is caused by too low
PASS_LIMIT. When ISR loops more than the limit, it spits the message.
I've been using a kernel with doubled the limit and I couldn't see no
problems. Maybe it's time to get rid of the message now?
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Ram Gupta <ram.gupta5@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/8250.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -81,7 +81,7 @@ static unsigned int skip_txen_test; /* f
#define DEBUG_INTR(fmt...) do { } while (0)
#endif
-#define PASS_LIMIT 256
+#define PASS_LIMIT 512
#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
next prev parent reply other threads:[~2013-01-24 21:18 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-24 21:18 [ 00/15] 3.0.61-stable review Greg Kroah-Hartman
2013-01-24 21:18 ` [ 01/15] drm/i915: Invalidate the relocation presumed_offsets along the slow path Greg Kroah-Hartman
2013-01-24 21:18 ` [ 02/15] ftrace: Be first to run code modification on modules Greg Kroah-Hartman
2013-01-24 21:18 ` [ 03/15] PCI: Allow pcie_aspm=force even when FADT indicates it is unsupported Greg Kroah-Hartman
2013-01-24 21:18 ` [ 04/15] USB: UHCI: fix IRQ race during initialization Greg Kroah-Hartman
2013-01-24 21:18 ` [ 05/15] SCSI: sd: Reshuffle init_sd to avoid crash Greg Kroah-Hartman
2013-01-24 21:18 ` [ 06/15] drivers/firmware/dmi_scan.c: check dmi version when get system uuid Greg Kroah-Hartman
2013-01-24 21:18 ` [ 07/15] drivers/firmware/dmi_scan.c: fetch dmi version from SMBIOS if it exists Greg Kroah-Hartman
2013-01-24 21:18 ` Greg Kroah-Hartman [this message]
2013-01-24 21:18 ` [ 09/15] staging: usbip: changed function return type to void Greg Kroah-Hartman
2013-01-24 21:18 ` [ 10/15] drm/i915: Implement WaDisableHiZPlanesWhenMSAAEnabled Greg Kroah-Hartman
2013-01-24 21:18 ` [ 11/15] ahci: Add identifiers for ASM106x devices Greg Kroah-Hartman
2013-01-25 20:45 ` Jerry Snitselaar
2013-01-25 22:00 ` Abdallah Chatila
2013-01-28 4:42 ` Greg Kroah-Hartman
2013-01-24 21:18 ` [ 12/15] x86: Use enum instead of literals for trap values [PARTIAL] Greg Kroah-Hartman
2013-01-24 21:18 ` [ 13/15] SGI-XP: handle non-fatal traps Greg Kroah-Hartman
2013-01-24 21:18 ` [ 14/15] ACPI / cpuidle: Fix NULL pointer issues when cpuidle is disabled Greg Kroah-Hartman
2013-01-24 21:18 ` [ 15/15] ioat: Fix DMA memory sync direction correct flag Greg Kroah-Hartman
2013-01-25 18:04 ` [ 00/15] 3.0.61-stable review Shuah Khan
2013-01-26 11:58 ` Satoru Takeuchi
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