On Wed, 7 Sep 2011, David Miller wrote: > From: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Date: Wed, 7 Sep 2011 19:57:21 +0200 (CEST) > > > On Wed, 7 Sep 2011, David Miller wrote: > >> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > >> Date: Wed, 7 Sep 2011 19:33:52 +0200 (CEST) > >> > >> We had big problems when openning thousands of virtual network > >> devices, each with their own unique IRQ, and pointed all at the same > >> cpu, and we'd get IRQ stack overflows. > >> > >> See commit c58543c869606532c2382f027d6466f4672ea756 > >> > >> So this change to make IRQF_DISABLED a nop has reintroduced this bug. > > > > See commit e58aa3d2d0cc01ad8d6f7f640a0670433f794922 > > > > We run ALL interrupt handlers with interrupts disabled for that reason > > and we even check and yell when an interrupt handler returns with > > interrupts enabled. That's why IRQF_DISABLED became meaningless. > > Awesome. > > Can I politely ask that a reference to that commit and something like > your paragraph here explaining things is added to these IRQF_DISABLED > removal patches? That's a good idea. I'll let sed loose on the changelogs when I pick them up. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
