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Mon, 17 Oct 2022 09:02:40 -0700 (PDT) From: "Uladzislau Rezki (Sony)" To: Andrew Morton Cc: linux-mm@kvack.org, LKML , Christoph Hellwig , Matthew Wilcox , Nicholas Piggin , Uladzislau Rezki , Oleksiy Avramchenko Subject: [PATCH 3/7] mm: vmap: Add a free_vmap_area_noflush trace event Date: Mon, 17 Oct 2022 18:02:28 +0200 Message-Id: <20221017160233.16582-5-urezki@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221017160233.16582-1-urezki@gmail.com> References: <20221017160233.16582-1-urezki@gmail.com> MIME-Version: 1.0 ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666022562; a=rsa-sha256; cv=none; b=hlnjkFyjmxhpVTlHP4Qyfa/af2Wm5ZX0CpwF31TQAcCrPfR4Va5Nwxyp/wmjpxTLVs7mOC BA+ECUbBwT27c6+jAsOrQMXVHemJsewB8KPWIRWAfzdiH+IEoCFRt9RzmOrBAPGpxvFPHv KDsbd1Eje8cPbZ5YZnA5yR0FplADkic= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=FwjCcmT1; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf14.hostedemail.com: domain of urezki@gmail.com designates 209.85.218.53 as permitted sender) smtp.mailfrom=urezki@gmail.com ARC-Message-Signature: i=1; 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To: Steven Rostedt Signed-off-by: Uladzislau Rezki (Sony) --- include/trace/events/vmap.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/include/trace/events/vmap.h b/include/trace/events/vmap.h index 2af2b84c6eb7..5ba9bf58772a 100644 --- a/include/trace/events/vmap.h +++ b/include/trace/events/vmap.h @@ -83,6 +83,40 @@ TRACE_EVENT(purge_vmap_area_lazy, __entry->start, __entry->end, __entry->npurged) ); +/** + * free_vmap_area_noflush - called when a vmap area is freed + * @va_start: a start address of VA + * @nr_lazy: number of current lazy pages + * @nr_lazy_max: number of maximum lazy pages + * + * This event is used for a debug purpose. It gives some + * indication about a VA that is released, number of current + * outstanding areas and a maximum allowed threshold before + * dropping all of them. + */ +TRACE_EVENT(free_vmap_area_noflush, + + TP_PROTO(unsigned long va_start, unsigned long nr_lazy, + unsigned long nr_lazy_max), + + TP_ARGS(va_start, nr_lazy, nr_lazy_max), + + TP_STRUCT__entry( + __field(unsigned long, va_start) + __field(unsigned long, nr_lazy) + __field(unsigned long, nr_lazy_max) + ), + + TP_fast_assign( + __entry->va_start = va_start; + __entry->nr_lazy = nr_lazy; + __entry->nr_lazy_max = nr_lazy_max; + ), + + TP_printk("va_start=0x%lx nr_lazy=%lu nr_lazy_max=%lu", + __entry->va_start, __entry->nr_lazy, __entry->nr_lazy_max) +); + #endif /* _TRACE_VMAP_H */ /* This part must be outside protection */