From: sashiko-bot@kernel.org
To: "Alireza Haghdoost" <haghdoost@uber.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH v3 1/6] perf symbols: Fix broken ELF_C_READ_MMAP fallback guard
Date: Fri, 25 Sep 2026 19:21:25 +0000 [thread overview]
Message-ID: <20260925192125.8064B1F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260925-perf-symbol-memory-send-v3-1-3e4e234c363b@uber.com>
> From: Alireza Haghdoost <haghdoost@uber.com>
>
> Commit 22dd1ac91a77 ("tools: Remove feature-libelf-mmap feature
> detection") replaced perf's compile-time feature test with an #ifdef on
> ELF_C_READ_MMAP. ELF_C_READ_MMAP is an Elf_Cmd enumerator rather than a
> preprocessor macro, so the condition is always false and perf silently
> uses ELF_C_READ.
>
> Perf already requires a sufficiently recent elfutils version that
> provides ELF_C_READ_MMAP. Use the enumerator directly instead of
> restoring a feature probe or retaining an unreachable fallback.
>
> Fixes: 22dd1ac91a77 ("tools: Remove feature-libelf-mmap feature detection")
> Signed-off-by: Alireza Haghdoost <haghdoost@uber.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260925-perf-symbol-memory-send-v3-0-3e4e234c363b@uber.com?part=1
next prev parent reply other threads:[~2026-09-25 19:21 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-25 19:09 [PATCH v3 0/6] perf script: Bounded and lazy symbol loading Alireza Haghdoost
2026-09-25 19:09 ` Alireza Haghdoost via B4 Relay
2026-09-25 19:09 ` [PATCH v3 1/6] perf symbols: Fix broken ELF_C_READ_MMAP fallback guard Alireza Haghdoost
2026-09-25 19:09 ` Alireza Haghdoost via B4 Relay
2026-09-25 19:21 ` sashiko-bot [this message]
2026-09-25 19:09 ` [PATCH v3 2/6] perf dso: Allow reading DSO data from an explicit file Alireza Haghdoost
2026-09-25 19:09 ` Alireza Haghdoost via B4 Relay
2026-09-25 19:26 ` sashiko-bot
2026-09-25 19:09 ` [PATCH v3 3/6] perf symbols: Factor out duplicate symbol selection Alireza Haghdoost
2026-09-25 19:09 ` Alireza Haghdoost via B4 Relay
2026-09-25 19:21 ` sashiko-bot
2026-09-25 19:40 ` Ian Rogers
2026-09-25 19:55 ` Alireza Haghdoost
2026-09-25 20:21 ` Ian Rogers
2026-09-25 19:09 ` [PATCH v3 4/6] perf script: Add --max-symbol-bytes to bound ELF symbol memory Alireza Haghdoost
2026-09-25 19:09 ` Alireza Haghdoost via B4 Relay
2026-09-25 19:26 ` sashiko-bot
2026-09-25 19:09 ` [PATCH v3 5/6] perf script: Add --lazy-load-symbols for lazy symbol loading Alireza Haghdoost
2026-09-25 19:09 ` Alireza Haghdoost via B4 Relay
2026-09-25 19:27 ` sashiko-bot
2026-09-25 19:09 ` [PATCH v3 6/6] perf test: Test lazy symbol loading and symbol memory limits Alireza Haghdoost
2026-09-25 19:09 ` Alireza Haghdoost via B4 Relay
2026-09-25 19:26 ` sashiko-bot
2026-09-25 20:20 ` [PATCH v3 0/6] perf script: Bounded and lazy symbol loading Ian Rogers
2026-09-25 21:28 ` Alireza Haghdoost
2026-09-25 21:55 ` Ian Rogers
2026-09-30 19:58 ` Alireza Haghdoost
2026-09-30 21:18 ` Ian Rogers
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