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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Xie YuanbinandAndrew Morton
e57d6e9e20
Commit97f0b13452("tracing: add trace event for memory-failure") introduced memory_failure_event in ras subsystem. commit31807483d3("mm/memory-failure: remove the selection of RAS") changed memory_failure_event to memory_failure subsystem. This breaks the backward compatibility, some user programs rely on it. Change memory_failure_event to ras subsystem to keep backward compatibility. Link: https://lore.kernel.org/20260605081213.154660-1-xieyuanbin1@huawei.com Fixes:31807483d3("mm/memory-failure: remove the selection of RAS") Signed-off-by: Xie Yuanbin <xieyuanbin1@huawei.com> Reported-by: Yi Lai <yi1.lai@intel.com> Reported-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Closes: https://lore.kernel.org/linux-mm/CY8PR11MB7134346A3E4BB28ECA28D6E989132@CY8PR11MB7134.namprd11.prod.outlook.com Acked-by: David Hildenbrand (Arm) <david@kernel.org> Reviewed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Reviewed-by: Lance Yang <lance.yang@linux.dev> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Tested-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Reviewed-by: Lance Yang <lance.yang@linux.dev> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Borislav Petkov <bp@alien8.de> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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/*
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* For historical versions, memory_failure_event is in ras subsystem,
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* some user programs depend on it.
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*/
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#define TRACE_SYSTEM ras
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#define TRACE_INCLUDE_FILE memory-failure
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#if !defined(_TRACE_MEMORY_FAILURE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_MEMORY_FAILURE_H
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#include <linux/tracepoint.h>
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#include <linux/mm.h>
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/*
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* memory-failure recovery action result event
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*
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* unsigned long pfn - Page Frame Number of the corrupted page
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* int type - Page types of the corrupted page
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* int result - Result of recovery action
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*/
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#define MF_ACTION_RESULT \
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EM ( MF_IGNORED, "Ignored" ) \
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EM ( MF_FAILED, "Failed" ) \
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EM ( MF_DELAYED, "Delayed" ) \
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EMe ( MF_RECOVERED, "Recovered" )
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#define MF_PAGE_TYPE \
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EM ( MF_MSG_KERNEL, "reserved kernel page" ) \
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EM ( MF_MSG_KERNEL_HIGH_ORDER, "high-order kernel page" ) \
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EM ( MF_MSG_HUGE, "huge page" ) \
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EM ( MF_MSG_FREE_HUGE, "free huge page" ) \
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EM ( MF_MSG_GET_HWPOISON, "get hwpoison page" ) \
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EM ( MF_MSG_UNMAP_FAILED, "unmapping failed page" ) \
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EM ( MF_MSG_DIRTY_SWAPCACHE, "dirty swapcache page" ) \
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EM ( MF_MSG_CLEAN_SWAPCACHE, "clean swapcache page" ) \
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EM ( MF_MSG_DIRTY_MLOCKED_LRU, "dirty mlocked LRU page" ) \
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EM ( MF_MSG_CLEAN_MLOCKED_LRU, "clean mlocked LRU page" ) \
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EM ( MF_MSG_DIRTY_UNEVICTABLE_LRU, "dirty unevictable LRU page" ) \
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EM ( MF_MSG_CLEAN_UNEVICTABLE_LRU, "clean unevictable LRU page" ) \
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EM ( MF_MSG_DIRTY_LRU, "dirty LRU page" ) \
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EM ( MF_MSG_CLEAN_LRU, "clean LRU page" ) \
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EM ( MF_MSG_TRUNCATED_LRU, "already truncated LRU page" ) \
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EM ( MF_MSG_BUDDY, "free buddy page" ) \
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EM ( MF_MSG_DAX, "dax page" ) \
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EM ( MF_MSG_UNSPLIT_THP, "unsplit thp" ) \
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EM ( MF_MSG_ALREADY_POISONED, "already poisoned" ) \
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EM ( MF_MSG_PFN_MAP, "non struct page pfn" ) \
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EMe ( MF_MSG_UNKNOWN, "unknown page" )
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/*
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* First define the enums in MM_ACTION_RESULT to be exported to userspace
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* via TRACE_DEFINE_ENUM().
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*/
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#undef EM
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#undef EMe
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#define EM(a, b) TRACE_DEFINE_ENUM(a);
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#define EMe(a, b) TRACE_DEFINE_ENUM(a);
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MF_ACTION_RESULT
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MF_PAGE_TYPE
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/*
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* Now redefine the EM() and EMe() macros to map the enums to the strings
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* that will be printed in the output.
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*/
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#undef EM
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#undef EMe
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#define EM(a, b) { a, b },
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#define EMe(a, b) { a, b }
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TRACE_EVENT(memory_failure_event,
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TP_PROTO(unsigned long pfn,
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int type,
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int result),
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TP_ARGS(pfn, type, result),
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TP_STRUCT__entry(
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__field(unsigned long, pfn)
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__field(int, type)
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__field(int, result)
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),
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TP_fast_assign(
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__entry->pfn = pfn;
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__entry->type = type;
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__entry->result = result;
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),
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TP_printk("pfn %#lx: recovery action for %s: %s",
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__entry->pfn,
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__print_symbolic(__entry->type, MF_PAGE_TYPE),
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__print_symbolic(__entry->result, MF_ACTION_RESULT)
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)
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);
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#endif /* _TRACE_MEMORY_FAILURE_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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