summaryrefslogtreecommitdiff
path: root/include/linux/aer.h
diff options
context:
space:
mode:
authorHuang Ying <ying.huang@intel.com>2011-02-21 13:54:41 +0800
committerLen Brown <len.brown@intel.com>2011-03-21 22:59:06 -0400
commit885b976fada5bc6595a9fd3e67e3cb1a3d11f50b (patch)
tree8b598bd3b265c0bbe8237e129410fdc80fe7847a /include/linux/aer.h
parentdd9c1549edef02290edced639f67b54a25abbe0e (diff)
ACPI, APEI, Add ERST record ID cache
APEI ERST firmware interface and implementation has no multiple users in mind. For example, if there is four records in storage with ID: 1, 2, 3 and 4, if two ERST readers enumerate the records via GET_NEXT_RECORD_ID as follow, reader 1 reader 2 1 2 3 4 -1 -1 where -1 signals there is no more record ID. Reader 1 has no chance to check record 2 and 4, while reader 2 has no chance to check record 1 and 3. And any other GET_NEXT_RECORD_ID will return -1, that is, other readers will has no chance to check any record even they are not cleared by anyone. This makes raw GET_NEXT_RECORD_ID not suitable for used by multiple users. To solve the issue, an in-memory ERST record ID cache is designed and implemented. When enumerating record ID, the ID returned by GET_NEXT_RECORD_ID is added into cache in addition to be returned to caller. So other readers can check the cache to get all record ID available. Signed-off-by: Huang Ying <ying.huang@intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/linux/aer.h')
0 files changed, 0 insertions, 0 deletions