linux-kernel - Re: [PATCH] perf trace: Use the right bpf_probe_read(

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Message-ID: <169783679849.2217970.1585610113132508409.b4-ty@kernel.org>
Date:   Fri, 20 Oct 2023 14:21:15 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     irogers@...gle.com, linux-kernel@...r.kernel.org,
        iii@...ux.ibm.com, Thomas Richter <tmricht@...ux.ibm.com>,
        linux-perf-users@...r.kernel.org, acme@...nel.org
Cc:     sumanthk@...ux.ibm.com, hca@...ux.ibm.com,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        svens@...ux.ibm.com, gor@...ux.ibm.com
Subject: Re: [PATCH] perf trace: Use the right bpf_probe_read(_str) variant for reading user data

On Thu, 19 Oct 2023 10:26:42 +0200, Thomas Richter wrote:
> Perf test case 111 Check open filename arg using perf trace + vfs_getname
> fails on s390. This is caused by a failing function
> bpf_probe_read() in file util/bpf_skel/augmented_raw_syscalls.bpf.c.
> 
> The root cause is the lookup by address. Function bpf_probe_read()
> is used. This function works only for architectures
> with ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE.
> 
> [...]

Applied to perf-tools-next, thanks!