On Fri, Feb 28, 2020 at 05:48:17PM +0000, James Morse wrote: > APEI is unable to do all of its error handling work in nmi-context, so > it defers non-fatal work onto the irq_work queue. arch_irq_work_raise() > sends an IPI to the calling cpu, but this is not guaranteed to be taken > before returning to user-space. > > Unless the exception interrupted a context with irqs-masked, > irq_work_run() can run immediately. Otherwise return -EINPROGRESS to > indicate ghes_notify_sea() found some work to do, but it hasn't > finished yet. > > With this apei_claim_sea() returning '0' means this external-abort was > also notification of a firmware-first RAS error, and that APEI has > processed the CPER records. > > Signed-off-by: James Morse <james.morse@xxxxxxx> > --- > Changes since $last_year: > * Dropped all the tags ... its been a year. I think this patch hasn't changed much since, so my ack still stands. Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
