From: Siddhesh Poyarekar <siddhesh@gotplt.org>
To: DJ Delorie <dj@redhat.com>
Cc: adhemerval.zanella@linaro.org, libc-alpha@sourceware.org
Subject: Re: RFC: system-wide default tunables
Date: Wed, 18 Oct 2023 10:20:29 -0400 [thread overview]
Message-ID: <44db5ffe-3612-86fb-215b-11cc873752b3@gotplt.org> (raw)
In-Reply-To: <xno7gxuq6o.fsf@greed.delorie.com>
On 2023-10-17 13:14, DJ Delorie wrote:
> Siddhesh Poyarekar <siddhesh@gotplt.org> writes:
>> Actually I wasn't thinking of any conf file related constraint markup, I
>> was thinking of TUNABLE_CALLBACKs encoding constraints in whichever way
>> they deem fit. e.g. for ibt it could be:
>>
>> void
>> TUNABLE_CALLBACK (set_x86_ibt) (tunable_val_t *valp)
>> {
>> if (!strcmp (valp->system_default, "always_on"))
>> return;
>>
>> /* Otherwise read the value. */
>> }
>
> So the tunable definition *itself* decides whether the sysadmin wants to
> override a user?
Sort of; the tunable definition decides how much control a systemwide
tunable (consequently the sysadmin) has, on the capability of a user to
override it.
So for security tunables it could be a latch value (like above) that a
user may not be able to override. For numeric value tunables it could
be a range that a user is not allowed to surpass. For string tunables,
it could be a list of values the user is allowed to set; the first valid
value in the list could be the default.
Thanks,
Sid
next prev parent reply other threads:[~2023-10-18 14:20 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-04 20:55 DJ Delorie
2023-10-06 14:44 ` Adhemerval Zanella Netto
2023-10-06 17:12 ` Adhemerval Zanella Netto
2023-10-06 18:29 ` DJ Delorie
2023-10-06 19:14 ` Adhemerval Zanella Netto
2023-10-06 20:25 ` DJ Delorie
2023-10-17 14:10 ` Adhemerval Zanella Netto
2023-10-17 14:17 ` Siddhesh Poyarekar
2023-10-17 14:37 ` Siddhesh Poyarekar
2023-10-17 15:43 ` DJ Delorie
2023-10-17 15:58 ` Siddhesh Poyarekar
2023-10-17 16:45 ` DJ Delorie
2023-10-17 16:55 ` Siddhesh Poyarekar
2023-10-17 17:14 ` DJ Delorie
2023-10-18 14:20 ` Siddhesh Poyarekar [this message]
2023-10-17 17:40 ` Zack Weinberg
2023-10-17 17:47 ` DJ Delorie
2023-10-17 18:17 ` Zack Weinberg
2023-10-17 18:21 ` DJ Delorie
2023-10-06 22:04 ` DJ Delorie
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