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openSUSE:Leap:15.5:Update
powerpc-utils.32342
ppc64_cpu-Clean-up-sysfs-smt-control-error-hand...
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File ppc64_cpu-Clean-up-sysfs-smt-control-error-handling.patch of Package powerpc-utils.32342
From 916a239f518e96c77c35a58db7f1dcc00e5fb5f0 Mon Sep 17 00:00:00 2001 From: Michal Suchanek <msuchanek@suse.de> Date: Fri, 9 Feb 2024 13:12:33 +0100 Subject: [PATCH] ppc64_cpu: Clean up sysfs smt/control error handling When the kernel does not support the sysfs intercface do not report and arror, fall back to the old method silently. Suggested-by: Nathan Lynch<nathanl@linux.ibm.com> Signed-off-by: Michal Suchanek <msuchanek@suse.de> --- It has been suggested to also not try the old iterface in case of unknown error because it's unlikely to work but that would needlessly complicate the code. --- src/ppc64_cpu.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/src/ppc64_cpu.c b/src/ppc64_cpu.c index c318928..759ceff 100644 --- a/src/ppc64_cpu.c +++ b/src/ppc64_cpu.c @@ -368,10 +368,20 @@ static int is_dscr_capable(void) static int set_smt_control(int smt_state) { if (set_attribute(SYS_SMT_CONTROL, "%d", smt_state)) { - /* Silently ignore kernel not supporting this feature */ - if (errno != ENODEV) - perror(SYS_SMT_CONTROL); - return -1; + switch (errno) { + case ENOENT: + /* + * The kernel does not have the interface. + * Try the old method. + */ + return -1; + case ENODEV: + /* Setting SMT state not supported on the system. */ + return 0; + default: + perror(SYS_SMT_CONTROL); + return -1; + } } return 0; } -- 2.43.0
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