linux-kernel - RE: [PATCH v2 12/14] platform/x86/intel/ifs: Add current

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Date:   Mon, 14 Nov 2022 19:38:35 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     "Hansen, Dave" <dave.hansen@...el.com>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "Macieira, Thiago" <thiago.macieira@...el.com>,
        "Joseph, Jithu" <jithu.joseph@...el.com>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>,
        "markgross@...nel.org" <markgross@...nel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "patches@...ts.linux.dev" <patches@...ts.linux.dev>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        "Jimenez Gonzalez, Athenas" <athenas.jimenez.gonzalez@...el.com>,
        "Mehta, Sohil" <sohil.mehta@...el.com>
Subject: RE: [PATCH v2 12/14] platform/x86/intel/ifs: Add current_batch sysfs
 entry

> You're making these sequence numbers unnecessarily magical.
> And they don't need to be.

I see them as opaque tokens.  User asks to load "test set 2" with "echo 2 > current_batch"
and the driver finds the file for the ff-mm-ss that contains batch 2 of tests.

Numbers are plausible tokens - except for the sequence implication ... you don't
have to start at batch 1, and you don't need to go in any particular order. But realistically
people will run {1..N} in order, and there's no harm if they think they have to do that.

For Thiago's use case, numbers are better than filenames because the container running
the test may not have access to the directory to find the filenames.

But if this is the only roadblock to taking this patch series, then we can switch to filenames
and make Thiago find some way for the container to be given the list of tests to run in the
form of filenames.

-Tony