diff options
| author | Niklas Schnelle | 2022-02-25 09:45:24 +0100 |
|---|---|---|
| committer | Heiko Carstens | 2022-04-25 13:54:15 +0200 |
| commit | 34fb0e703480a65754e1f8289d754dfc953ba8d4 (patch) | |
| tree | a3e10fd2398c342ce0f784e4ce3883387ab62ac5 /arch/s390/include | |
| parent | cde8833e40dddd6e0f067f43b2734a1ad4495065 (diff) | |
s390/pci: add error record for CC 2 retries
Currently it is not detectable from within Linux when PCI instructions
are retried because of a busy condition. Detecting such conditions and
especially how long they lasted can however be quite useful in problem
determination. This patch enables this by adding an s390dbf error log
when a CC 2 is first encountered as well as after the retried
instruction.
Despite being unlikely it may be possible that these added debug
messages drown out important other messages so allow setting the debug
level in zpci_err_insn*() and set their level to 1 so they can be
filtered out if need be.
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/pci_debug.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/s390/include/asm/pci_debug.h b/arch/s390/include/asm/pci_debug.h index 5dfe47588277..3bb4e7e33a0e 100644 --- a/arch/s390/include/asm/pci_debug.h +++ b/arch/s390/include/asm/pci_debug.h @@ -17,9 +17,14 @@ extern debug_info_t *pci_debug_err_id; debug_text_event(pci_debug_err_id, 0, debug_buffer); \ } while (0) +static inline void zpci_err_hex_level(int level, void *addr, int len) +{ + debug_event(pci_debug_err_id, level, addr, len); +} + static inline void zpci_err_hex(void *addr, int len) { - debug_event(pci_debug_err_id, 0, addr, len); + zpci_err_hex_level(0, addr, len); } #endif |