> -----Original Message----- > From: Intel-wired-lan <[email protected]> On Behalf Of > Loktionov, Aleksandr > Sent: Wednesday, November 12, 2025 5:06 AM > To: Brian Vazquez <[email protected]>; Brian Vazquez > <[email protected]>; Nguyen, Anthony L > <[email protected]>; Kitszel, Przemyslaw > <[email protected]>; David S. Miller <[email protected]>; > Eric Dumazet <[email protected]>; Jakub Kicinski <[email protected]>; > Paolo Abeni <[email protected]>; [email protected] > Cc: David Decotigny <[email protected]>; Singhai, Anjali > <[email protected]>; Samudrala, Sridhar > <[email protected]>; [email protected]; > [email protected]; Tantilov, Emil S <[email protected]> > Subject: Re: [Intel-wired-lan] [iwl-net PATCH] idpf: reduce mbx_task schedule > delay to 300us > > > > > -----Original Message----- > > From: Intel-wired-lan <[email protected]> On Behalf > > Of Brian Vazquez > > Sent: Monday, November 10, 2025 9:59 PM > > To: Brian Vazquez <[email protected]>; Nguyen, Anthony L > > <[email protected]>; Kitszel, Przemyslaw > > <[email protected]>; David S. Miller <[email protected]>; > > Eric Dumazet <[email protected]>; Jakub Kicinski <[email protected]>; > > Paolo Abeni <[email protected]>; [email protected] > > Cc: David Decotigny <[email protected]>; Singhai, Anjali > > <[email protected]>; Samudrala, Sridhar > > <[email protected]>; [email protected]; > > [email protected]; Tantilov, Emil S <[email protected]>; > > Brian Vazquez <[email protected]> > > Subject: [Intel-wired-lan] [iwl-net PATCH] idpf: reduce mbx_task > > schedule delay to 300us > > > > During the IDPF init phase, the mailbox runs in poll mode until it is > > configured to properly handle interrupts. The previous delay of 300ms > > is excessively long for the mailbox polling mechanism, which causes a > > slow initialization of ~2s: > > > > echo 0000:06:12.4 > /sys/bus/pci/drivers/idpf/bind > > > > [ 52.444239] idpf 0000:06:12.4: enabling device (0000 -> 0002) > > [ 52.485005] idpf 0000:06:12.4: Device HW Reset initiated > > [ 54.177181] idpf 0000:06:12.4: PTP init failed, err=-EOPNOTSUPP > > [ 54.206177] idpf 0000:06:12.4: Minimum RX descriptor support not > > provided, using the default > > [ 54.206182] idpf 0000:06:12.4: Minimum TX descriptor support not > > provided, using the default > > > > Changing the delay to 300us avoids the delays during the initial > > mailbox transactions, making the init phase much faster: > > > > [ 83.342590] idpf 0000:06:12.4: enabling device (0000 -> 0002) > > [ 83.384402] idpf 0000:06:12.4: Device HW Reset initiated > > [ 83.518323] idpf 0000:06:12.4: PTP init failed, err=-EOPNOTSUPP > > [ 83.547430] idpf 0000:06:12.4: Minimum RX descriptor support not > > provided, using the default > > [ 83.547435] idpf 0000:06:12.4: Minimum TX descriptor support not > > provided, using the default > > > > Signed-off-by: Brian Vazquez <[email protected]> > > --- > > Reviewed-by: Aleksandr Loktionov <[email protected]>
Tested-by: Samuel Salin <[email protected]>
