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Mon, 14 Nov 2022 17:04:58 +0000 Received: from DS0PR10MB6798.namprd10.prod.outlook.com ([fe80::d361:ae7a:f995:2bb2]) by DS0PR10MB6798.namprd10.prod.outlook.com ([fe80::d361:ae7a:f995:2bb2%3]) with mapi id 15.20.5791.027; Mon, 14 Nov 2022 17:04:58 +0000 From: Nick Alcock To: Luis Chamberlain Cc: thunder.leizhen@huawei.com, masahiroy@kernel.org, linux-modules@vger.kernel.org, linux-kernel@vger.kernel.org, arnd@arndb.de, akpm@linux-foundation.org, eugene.loh@oracle.com, kris.van.hees@oracle.com, Steven Rostedt Subject: Re: [PATCH v9 4/8] kallsyms: introduce sections needed to map symbols to built-in modules References: <20221109134132.9052-1-nick.alcock@oracle.com> <20221109134132.9052-5-nick.alcock@oracle.com> Emacs: because one operating system isn't enough. 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=?us-ascii?Q?skuKqbNtGBFvu7ohqeQnSUkCDpvJPpk0fYdF6z664CZtCQQLQcm1j+SBW0FY?= =?us-ascii?Q?PRFA?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: e544e605-8400-41cc-59a0-08dac6625c5b X-MS-Exchange-CrossTenant-AuthSource: DS0PR10MB6798.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2022 17:04:58.6025 (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: pk3q7hE2CWO0VihKRDRUTUFQDJw1yfHQLOj81MmMZSijjcT1BZ1MBlm0ABEFBNIsERWAnYqzZQygjWgjSrQqvA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR10MB6278 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-14_13,2022-11-11_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 phishscore=0 bulkscore=0 mlxlogscore=906 spamscore=0 adultscore=0 malwarescore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211140122 X-Proofpoint-ORIG-GUID: c8qYa1lUPjcKT2wnJkxa3cHuPt336vNk X-Proofpoint-GUID: c8qYa1lUPjcKT2wnJkxa3cHuPt336vNk Precedence: bulk List-ID: On 13 Nov 2022, Luis Chamberlain outgrape: > On Wed, Nov 09, 2022 at 01:41:28PM +0000, Nick Alcock wrote: >> The mapping consists of three new symbols > > The entire commit log does not describe *why*. ... because it's in the other commit logs and the cover letter. I can repeat the motivation in this log too if you like. > Can I also trouble you to rebase on top of modules-next [0] Sure! > Does the kallsyms loop more than 3 times now with Zhen Lei's work and > your new symbols on top on a allyesconfig build? I don't understand the question, sorry. If this is about the number of KALLSYMS invocations in the kernel build, that should be unchanged by this patch. This was an explicit design goal because it's quite slow to run kallsyms more times and I was already feeling guilty about having to bring back the tristate recursion. I haven't tried it with Zhen Lei's work: will try for the next iteration, as a matter of course after the rebase. (And, looking at the patch series at the top of modules-next, wow is that quite a hefty performance improvement. And a hefty memory usage increase :( I have a horrible feeling that one of my machines won't have enough memory to boot after this goes in, but it was terribly outdated anyway.)