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Message-ID: <aEiZ212HZo3-zpMc@char.us.oracle.com> Date: Tue, 10 Jun 2025 16:47:23 -0400 From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> To: allison.henderson@...cle.com, netdev@...r.kernel.org, linux-rdma@...r.kernel.org, rds-devel@....oracle.com, guro@...com, tj@...nel.org, kernel-team@...com, surenb@...gle.com, peterz@...radead.org, hannes@...xchg.org, mkoutny@...e.com, cgroups@...r.kernel.org, andrew@...n.ch Subject: Re: [rds-devel] [PATCH RFC v1] Feature reporting of RDS driver. On Tue, Jun 10, 2025 at 12:27:24PM -0400, Konrad Rzeszutek Wilk via rds-devel wrote: > Hi folks, Hi cgroup folks, Andrew suggested that I reach out to you all since you had implemented something very similar via: 3958e2d0c34e1 01ee6cfb1483f And I was wondering if you have have feedback on what worked for you, best practices, etc. Manually CCing you so you will shortly be copied on the patch too. > > This patch addresses an issue where we have applications compiled against > against older (or newer) kernels. RDS does not have any ioctls to query > for what version of ABIs it has or what features it has. Hence this solution > that proposes to put this ABI information in user-accessible way. > > The patch does it two ways: > > 1) Power of the ELF .note section to put in the module so that > applications can discern before installing whether the kernel > has the right support. > > 2) The sysfs way - in which the /sys/modules/ was appealing since > it was simple and non invasive means of delivering this functionality, > and requires no changes to existing APIs or kernel logic. > > I am not tied to any specific ways - hence the request for collaboration. > > And as such questions, comments and discussion are appreciated and if you > have read to this part - then thank you for spending your time reading over > this cover letter and I am looking forward to your feedback on the patch! > > Konrad Rzeszutek Wilk (1): > rds: Expose feature parameters via sysfs and ELF note > > Documentation/ABI/stable/sysfs-driver-rds | 92 +++++++++++++++++++++++++++++++ > net/rds/af_rds.c | 33 +++++++++++ > 2 files changed, 125 insertions(+) > > _______________________________________________ > rds-devel mailing list > rds-devel@....oracle.com > https://oss.oracle.com/mailman/listinfo/rds-devel
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