32c28f7e41
The xdp tracepoints for mem id disconnect don't carry information about, why it was not safe_to_remove. The tracepoint page_pool:page_pool_inflight in this patch can be used for extract this info for further debugging. This patchset also adds tracepoint for the pages_state_* release/hold transitions, including a pointer to the page. This can be used for stats about in-flight pages, or used to debug page leakage via keeping track of page pointer and combining this with kprobe for __put_page(). Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM page_pool
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#if !defined(_TRACE_PAGE_POOL_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_PAGE_POOL_H
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#include <linux/types.h>
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#include <linux/tracepoint.h>
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#include <net/page_pool.h>
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TRACE_EVENT(page_pool_inflight,
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TP_PROTO(const struct page_pool *pool,
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s32 inflight, u32 hold, u32 release),
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TP_ARGS(pool, inflight, hold, release),
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TP_STRUCT__entry(
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__field(const struct page_pool *, pool)
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__field(s32, inflight)
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__field(u32, hold)
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__field(u32, release)
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),
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TP_fast_assign(
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__entry->pool = pool;
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__entry->inflight = inflight;
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__entry->hold = hold;
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__entry->release = release;
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),
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TP_printk("page_pool=%p inflight=%d hold=%u release=%u",
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__entry->pool, __entry->inflight, __entry->hold, __entry->release)
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);
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TRACE_EVENT(page_pool_state_release,
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TP_PROTO(const struct page_pool *pool,
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const struct page *page, u32 release),
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TP_ARGS(pool, page, release),
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TP_STRUCT__entry(
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__field(const struct page_pool *, pool)
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__field(const struct page *, page)
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__field(u32, release)
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),
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TP_fast_assign(
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__entry->pool = pool;
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__entry->page = page;
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__entry->release = release;
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),
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TP_printk("page_pool=%p page=%p release=%u",
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__entry->pool, __entry->page, __entry->release)
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);
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TRACE_EVENT(page_pool_state_hold,
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TP_PROTO(const struct page_pool *pool,
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const struct page *page, u32 hold),
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TP_ARGS(pool, page, hold),
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TP_STRUCT__entry(
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__field(const struct page_pool *, pool)
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__field(const struct page *, page)
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__field(u32, hold)
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),
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TP_fast_assign(
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__entry->pool = pool;
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__entry->page = page;
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__entry->hold = hold;
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),
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TP_printk("page_pool=%p page=%p hold=%u",
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__entry->pool, __entry->page, __entry->hold)
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);
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#endif /* _TRACE_PAGE_POOL_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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