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Subject: Re: [Intel-wired-lan] [PATCH iwl-next] idpf: preserve coalescing settings across resets X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On 2025-06-21 6:13 a.m., Simon Horman wrote: > On Fri, Jun 20, 2025 at 11:15:48AM -0600, Ahmed Zaki wrote: >> The IRQ coalescing config currently reside only inside struct >> idpf_q_vector. However, all idpf_q_vector structs are de-allocated and >> re-allocated during resets. This leads to user-set coalesce configuration >> to be lost. >> >> Add new fields to struct idpf_vport_user_config_data to save the user >> settings and re-apply them after reset. >> >> Reviewed-by: Madhu Chittim >> Signed-off-by: Ahmed Zaki > > Hi Ahmed, > > I am wondering if this patch also preserves coalescing settings in the case > where. > > 1. User sets coalescence for n queues > 2. The number of queues is reduced, say to m (where m < n) > 3. The user then increases the number of queues, say back to n > > It seems to me that in this scenario it's reasonable to preserve > the settings for queues 0 to m, bit not queues m + 1 to n. Hi Simon, I just did a quick test and it seems new settings are preserved in the above scenario: all n queues have the new coalescing settings. > > But perhaps this point is orthogonal to this change. > I am unsure. > Agreed, but let me know if it is a showstopper. Ahmed