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Wed, 14 Oct 2026 10:34:24 -0700 (PDT) Received: from localhost ([2a00:1358:e0ce:6800::3db]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a1bd9b35a6sm5977625e9.6.2026.10.14.10.34.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Oct 2026 10:34:24 -0700 (PDT) From: Ivan Shapovalov Date: Wed, 14 Oct 2026 20:34:10 +0300 Subject: [PATCH 4/4] perf: support zstd-compressed kernel modules Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261014-perf-zstd-v1-4-9652727886fa@intelfx.name> References: <20261014-perf-zstd-v1-0-9652727886fa@intelfx.name> In-Reply-To: <20261014-perf-zstd-v1-0-9652727886fa@intelfx.name> To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Nick Terrell , David Sterba Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Ivan Shapovalov X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1778; i=intelfx@intelfx.name; h=from:subject:message-id; bh=rmvkBuVskFV9e0uaXGAhwVaag8Z65mBKAip2mW59AKI=; b=LS0tLS1CRUdJTiBQR1AgTUVTU0FHRS0tLS0tCgpvd0did012TXdDVVdHM2x2aGVTbFF6Mk1wO VdTR0xMTzd4VTVPdmMxMTZSY29SY3ZHU2RtT0hwZXlibDNxRDNtCitSeko3YTMzL0hRbU96M2Uy VkhLd2lER3hTQXJwc2l5Ky82MHNFZHpKeWdkOHR5UUN6T0hsUWxrQ0FNWHB3Qk0KeEV1SzRhL2d WbmE5N0JleUJpRUhIdWpkNlk3bVNOSlBudjJtNmJUemhUN092ZFlySm4xalpHaVJxUzNiNUQ5dg pUdDZQQXpOdlRNeFRhaW1jdnZkSHowSmoxVkxyYVJ2WGw3QUJBQT09Cj1zTndNCi0tLS0tRU5EI FBHUCBNRVNTQUdFLS0tLS0K X-Developer-Key: i=intelfx@intelfx.name; a=openpgp; fpr=04DEA27EEF682F17083D892295D5D5F5A5A5E5E5 Support handling loading zstd-compressed DSOs in perf (in addition to existing support for gzip/xz formats). This allows loading of e.g. zstd-compressed kernel modules, as shipped by various distros including Arch. Signed-off-by: Ivan Shapovalov --- tools/perf/Makefile.config | 2 +- tools/perf/util/dso.c | 5 ++++- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 4d5993da9f945..dfdda22becc39 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -982,7 +982,7 @@ ifndef NO_LIBZSTD EXTLIBS += -lzstd $(call detected,CONFIG_ZSTD) else - $(warning No libzstd found, disables trace compression, please install libzstd-dev[el] and/or set LIBZSTD_DIR) + $(warning No libzstd found, disables zstd kernel module decompression and trace compression, please install libzstd-dev[el] and/or set LIBZSTD_DIR) NO_LIBZSTD := 1 endif endif diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c index 42bfe30a3b518..0e8886172e239 100644 --- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -277,6 +277,9 @@ static const struct { #endif #ifdef HAVE_LZMA_SUPPORT { "xz", lzma_decompress_to_file, lzma_is_compressed }, +#endif +#ifdef HAVE_ZSTD_SUPPORT + { "zst", zstd_decompress_to_fd, zstd_is_compressed }, #endif { NULL, NULL, NULL }, }; @@ -460,7 +463,7 @@ int __kmod_path__parse(struct kmod_path *m, const char *path, m->comp = is_supported_compression(ext + 1); if (m->comp > COMP_ID__NONE) - ext -= 3; + ext -= strlen(compressions[m->comp].fmt); /* Check .ko extension only if there's enough name left. */ if (ext > name) -- 2.55.0.8.g37e2a0019f