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Subject: Re: [Intel-wired-lan] [PATCH v2 1/4] Revert "igb: Disable threaded IRQ for igb_msix_other" 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 11/6/24 12:14, Wander Lairson Costa wrote: > This reverts commit 338c4d3902feb5be49bfda530a72c7ab860e2c9f. > > Sebastian noticed the ISR indirectly acquires spin_locks, which are > sleeping locks under PREEMPT_RT, which leads to kernel splats. I don't like to slow things down, but it would be great to have a Link: to the report, and the (minified) splat attached. > > Fixes: 338c4d3902feb ("igb: Disable threaded IRQ for igb_msix_other") > Reported-by: Sebastian Andrzej Siewior > Signed-off-by: Wander Lairson Costa > > --- > > Changelog: > > v2: Add the Fixes tag > Signed-off-by: Wander Lairson Costa > --- > drivers/net/ethernet/intel/igb/igb_main.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c > index b83df5f94b1f5..f1d0881687233 100644 > --- a/drivers/net/ethernet/intel/igb/igb_main.c > +++ b/drivers/net/ethernet/intel/igb/igb_main.c > @@ -907,7 +907,7 @@ static int igb_request_msix(struct igb_adapter *adapter) > int i, err = 0, vector = 0, free_vector = 0; > > err = request_irq(adapter->msix_entries[vector].vector, > - igb_msix_other, IRQF_NO_THREAD, netdev->name, adapter); > + igb_msix_other, 0, netdev->name, adapter); > if (err) > goto err_out; >