Messages in this thread |  | | Subject | Re: [PATCH v3 1/2] drivers: base: cacheinfo: Do not populate sysfs for unknown cache types | From | Jeffrey Hugo <> | Date | Wed, 3 Oct 2018 07:47:37 -0600 |
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On 10/3/2018 3:35 AM, Rafael J. Wysocki wrote: > On Friday, September 28, 2018 4:57:56 AM CEST Jeffrey Hugo wrote: >> If a cache has an unknown type because neither the hardware nor the >> firmware told us, an entry in the sysfs tree will be made, but the type >> file will not be present. lscpu depends on the type file being present >> for every entry, and will error out without printing system information >> if lscpu cannot open the type file. >> >> Presenting information about a cache without indicating its type is not >> useful, therefore if we hit a cache with an unknown type, stop populating >> sysfs so that userspace has the maximum amount of useful information. >> >> This addresses the following lscpu error, which prevents any output. >> lscpu: cannot open /sys/devices/system/cpu/cpu0/cache/index3/type: No such >> file or directory >> >> Suggested-by: Sudeep Holla <sudeep.holla@arm.com> >> Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org> >> Reviewed-by: Jeremy Linton <jeremy.linton@arm.com> >> --- >> drivers/base/cacheinfo.c | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c >> index 5d5b598..cf78fa6 100644 >> --- a/drivers/base/cacheinfo.c >> +++ b/drivers/base/cacheinfo.c >> @@ -615,6 +615,8 @@ static int cache_add_dev(unsigned int cpu) >> this_leaf = this_cpu_ci->info_list + i; >> if (this_leaf->disable_sysfs) >> continue; >> + if (this_leaf->type == CACHE_TYPE_NOCACHE) >> + break; >> cache_groups = cache_get_attribute_groups(this_leaf); >> ci_dev = cpu_device_create(parent, this_leaf, cache_groups, >> "index%1u", i); >> > > Can you please resend this patch with all tags collected so far?
Will do.
-- Jeffrey Hugo Qualcomm Datacenter Technologies as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
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