diff options
| author | Maciej W. Rozycki <macro@orcam.me.uk> | 2026-03-28 15:50:05 +0000 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2026-04-06 14:02:24 +0200 |
| commit | c523378ce6f65298fc1cb6be7c0e59a9008be446 (patch) | |
| tree | 2ad8d4f8e3f182d598563bbe9a96db34dcc33cae /arch/mips/dec | |
| parent | 798715fa06e1b3ff0f672721cca0a6789d5ebd37 (diff) | |
MIPS: DEC: Rate-limit memory errors for non-KN01 parity systems
Similarly to memory errors in ECC systems also rate-limit memory parity
errors for KN02-BA, KN02-CA, KN04-BA, KN04-CA DECstation and DECsystem
models. Unlike with ECC these events are always fatal and are less
likely to cause a message flood, but handle them the same way for
consistency.
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips/dec')
| -rw-r--r-- | arch/mips/dec/kn02xa-berr.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/arch/mips/dec/kn02xa-berr.c b/arch/mips/dec/kn02xa-berr.c index 9699fc4e6eb1..6e494db1e437 100644 --- a/arch/mips/dec/kn02xa-berr.c +++ b/arch/mips/dec/kn02xa-berr.c @@ -6,12 +6,13 @@ * DECstation/DECsystem 5000/20, /25, /33 (KN02-CA), 5000/50 * (KN04-CA) systems. * - * Copyright (c) 2005 Maciej W. Rozycki + * Copyright (c) 2005, 2026 Maciej W. Rozycki */ #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> +#include <linux/ratelimit.h> #include <linux/types.h> #include <asm/addrspace.h> @@ -50,6 +51,10 @@ static int dec_kn02xa_be_backend(struct pt_regs *regs, int is_fixup, static const char paritystr[] = "parity error"; static const char lanestat[][4] = { " OK", "BAD" }; + static DEFINE_RATELIMIT_STATE(rs, + DEFAULT_RATELIMIT_INTERVAL, + DEFAULT_RATELIMIT_BURST); + const char *kind, *agent, *cycle, *event; unsigned long address; @@ -79,18 +84,19 @@ static int dec_kn02xa_be_backend(struct pt_regs *regs, int is_fixup, if (is_fixup) action = MIPS_BE_FIXUP; - if (action != MIPS_BE_FIXUP) + if (action != MIPS_BE_FIXUP && __ratelimit(&rs)) { printk(KERN_ALERT "Bus error %s: %s %s %s at %#010lx\n", kind, agent, cycle, event, address); - if (action != MIPS_BE_FIXUP && address < 0x10000000) - printk(KERN_ALERT " Byte lane status %#3x -- " - "#3: %s, #2: %s, #1: %s, #0: %s\n", - (mer & KN02XA_MER_BYTERR) >> 8, - lanestat[(mer & KN02XA_MER_BYTERR_3) != 0], - lanestat[(mer & KN02XA_MER_BYTERR_2) != 0], - lanestat[(mer & KN02XA_MER_BYTERR_1) != 0], - lanestat[(mer & KN02XA_MER_BYTERR_0) != 0]); + if (address < 0x10000000) + printk(KERN_ALERT " Byte lane status %#3x -- " + "#3: %s, #2: %s, #1: %s, #0: %s\n", + (mer & KN02XA_MER_BYTERR) >> 8, + lanestat[(mer & KN02XA_MER_BYTERR_3) != 0], + lanestat[(mer & KN02XA_MER_BYTERR_2) != 0], + lanestat[(mer & KN02XA_MER_BYTERR_1) != 0], + lanestat[(mer & KN02XA_MER_BYTERR_0) != 0]); + } return action; } |