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From: Andrii Nakryiko <andrii@kernel.org>
To: <dwarves@vger.kernel.org>
Cc: <bpf@vger.kernel.org>, <kernel-team@fb.com>, <ast@kernel.org>,
	Andrii Nakryiko <andrii@kernel.org>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Andrii Nakryiko <andriin@fb.com>
Subject: [PATCH v2 dwarves 4/8] btf_encoder: discard CUs after BTF encoding
Date: Thu, 8 Oct 2020 16:39:56 -0700
Message-ID: <20201008234000.740660-5-andrii@kernel.org> (raw)
In-Reply-To: <20201008234000.740660-1-andrii@kernel.org>

From: Andrii Nakryiko <andriin@fb.com>

When doing BTF encoding/deduping, DWARF CUs are never used after BTF encoding
is done, so there is no point in wasting memory and keeping them in memory. So
discard them immediately.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
---
 pahole.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pahole.c b/pahole.c
index 61522175519e..bd9b993777ee 100644
--- a/pahole.c
+++ b/pahole.c
@@ -2384,7 +2384,7 @@ static enum load_steal_kind pahole_stealer(struct cu *cu,
 			fprintf(stderr, "Encountered error while encoding BTF.\n");
 			exit(1);
 		}
-		return LSK__KEEPIT;
+		return LSK__DELETE;
 	}
 
 	if (ctf_encode) {
-- 
2.24.1


  parent reply index

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-08 23:39 [PATCH v2 dwarves 0/8] Switch BTF loading and encoding to libbpf APIs Andrii Nakryiko
2020-10-08 23:39 ` [PATCH v2 dwarves 1/8] btf_loader: use libbpf to load BTF Andrii Nakryiko
2020-10-09 14:53   ` Arnaldo Carvalho de Melo
2020-10-09 17:49     ` Andrii Nakryiko
2020-10-08 23:39 ` [PATCH v2 dwarves 2/8] btf_encoder: use libbpf APIs to encode BTF type info Andrii Nakryiko
2020-10-08 23:39 ` [PATCH v2 dwarves 3/8] btf_encoder: fix emitting __ARRAY_SIZE_TYPE__ as index range type Andrii Nakryiko
2020-10-08 23:39 ` Andrii Nakryiko [this message]
2020-10-09 15:47   ` [PATCH v2 dwarves 4/8] btf_encoder: discard CUs after BTF encoding Arnaldo Carvalho de Melo
2020-10-08 23:39 ` [PATCH v2 dwarves 5/8] btf_encoder: revamp how per-CPU variables are encoded Andrii Nakryiko
2020-10-09 15:53   ` Arnaldo Carvalho de Melo
2020-10-08 23:39 ` [PATCH v2 dwarves 6/8] dwarf_loader: increase the size of lookup hash map Andrii Nakryiko
2020-10-08 23:39 ` [PATCH v2 dwarves 7/8] strings: use BTF's string APIs for strings management Andrii Nakryiko
2020-10-08 23:40 ` [PATCH v2 dwarves 8/8] btf_encoder: support cross-compiled ELF binaries with different endianness Andrii Nakryiko
2020-10-09 16:22 ` [PATCH v2 dwarves 0/8] Switch BTF loading and encoding to libbpf APIs Arnaldo Carvalho de Melo
2020-10-09 17:59   ` Andrii Nakryiko

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