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BN0PR10MB5128.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Feb 2025 15:39:54.6413 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 3eq+m+/yL/GqsXdhCNUleKL96aVxg6TAfooRVeBjm3qePrKTXMxM6G677nSv6ef+eb7mszPeS730F9pl2Y8yjg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR10MB4790 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-21_05,2025-02-20_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=273 phishscore=0 bulkscore=0 suspectscore=0 spamscore=0 adultscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2502100000 definitions=main-2502210112 X-Proofpoint-ORIG-GUID: w8VILoWckXyuKcNgI-lNedm9rKDz-7Qj X-Proofpoint-GUID: w8VILoWckXyuKcNgI-lNedm9rKDz-7Qj On 2/21/25 10:02 AM, Mike Snitzer wrote: > On Thu, Feb 20, 2025 at 01:17:42PM -0500, Chuck Lever wrote: >> * It might be argued that putting these experimental tunables under /sys >> eliminates the support longevity question, since there aren't strict >> rules about removing files under /sys. > > Right, I do think a sysfs knob (that defaults to disabled, requires > user opt-in) is a pretty useful and benign means to expose > experimental functionality. Seems like we want to figure out a blessed way to add this kind of experimental "hidden" tunable in a way that can be easily removed once we have the answers we need. I'd really like to keep the documented administrative interface as straightforward as possible, but I agree that having a way to experiment is valuable. -- Chuck Lever