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cb6c33d4dc
The result of the allocation attempt is not printed in trace_cma_alloc_finish, but it's important to do it so we can set filters to catch specific errors on allocation or to trigger some operations on specific errors. We have printed the result in log, but the log is conditional and could not be filtered by tracing events. It introduces little overhead to print this result. The result of allocation is named `errorno' in the trace. Link: https://lkml.kernel.org/r/20221208142130.1501195-1-haowenchao@huawei.com Signed-off-by: Wenchao Hao <haowenchao@huawei.com> Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org> Cc: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
139 lines
3 KiB
C
139 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM cma
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#if !defined(_TRACE_CMA_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_CMA_H
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#include <linux/types.h>
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(cma_alloc_class,
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TP_PROTO(const char *name, unsigned long pfn, const struct page *page,
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unsigned long count, unsigned int align),
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TP_ARGS(name, pfn, page, count, align),
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TP_STRUCT__entry(
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__string(name, name)
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__field(unsigned long, pfn)
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__field(const struct page *, page)
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__field(unsigned long, count)
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__field(unsigned int, align)
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),
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TP_fast_assign(
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__assign_str(name, name);
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__entry->pfn = pfn;
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__entry->page = page;
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__entry->count = count;
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__entry->align = align;
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),
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TP_printk("name=%s pfn=0x%lx page=%p count=%lu align=%u",
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__get_str(name),
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__entry->pfn,
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__entry->page,
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__entry->count,
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__entry->align)
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);
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TRACE_EVENT(cma_release,
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TP_PROTO(const char *name, unsigned long pfn, const struct page *page,
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unsigned long count),
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TP_ARGS(name, pfn, page, count),
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TP_STRUCT__entry(
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__string(name, name)
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__field(unsigned long, pfn)
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__field(const struct page *, page)
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__field(unsigned long, count)
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),
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TP_fast_assign(
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__assign_str(name, name);
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__entry->pfn = pfn;
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__entry->page = page;
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__entry->count = count;
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),
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TP_printk("name=%s pfn=0x%lx page=%p count=%lu",
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__get_str(name),
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__entry->pfn,
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__entry->page,
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__entry->count)
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);
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TRACE_EVENT(cma_alloc_start,
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TP_PROTO(const char *name, unsigned long count, unsigned int align),
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TP_ARGS(name, count, align),
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TP_STRUCT__entry(
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__string(name, name)
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__field(unsigned long, count)
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__field(unsigned int, align)
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),
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TP_fast_assign(
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__assign_str(name, name);
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__entry->count = count;
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__entry->align = align;
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),
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TP_printk("name=%s count=%lu align=%u",
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__get_str(name),
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__entry->count,
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__entry->align)
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);
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TRACE_EVENT(cma_alloc_finish,
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TP_PROTO(const char *name, unsigned long pfn, const struct page *page,
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unsigned long count, unsigned int align, int errorno),
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TP_ARGS(name, pfn, page, count, align, errorno),
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TP_STRUCT__entry(
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__string(name, name)
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__field(unsigned long, pfn)
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__field(const struct page *, page)
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__field(unsigned long, count)
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__field(unsigned int, align)
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__field(int, errorno)
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),
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TP_fast_assign(
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__assign_str(name, name);
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__entry->pfn = pfn;
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__entry->page = page;
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__entry->count = count;
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__entry->align = align;
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__entry->errorno = errorno;
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),
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TP_printk("name=%s pfn=0x%lx page=%p count=%lu align=%u errorno=%d",
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__get_str(name),
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__entry->pfn,
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__entry->page,
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__entry->count,
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__entry->align,
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__entry->errorno)
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);
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DEFINE_EVENT(cma_alloc_class, cma_alloc_busy_retry,
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TP_PROTO(const char *name, unsigned long pfn, const struct page *page,
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unsigned long count, unsigned int align),
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TP_ARGS(name, pfn, page, count, align)
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);
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#endif /* _TRACE_CMA_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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