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Date: Sat, 8 Apr 2017 12:23:05 +0200 From: Francois Romieu <romieu@...zoreil.com> To: ville.syrjala@...ux.intel.com Cc: David Miller <davem@...emloft.net>, eric.dumazet@...il.com, edumazet@...gle.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [regression v4.11] 617f01211baf ("8139too: use napi_complete_done()") David Miller <davem@...emloft.net> : [...] > One theory is that the interrupt masking isn't working properly > and interrupts are still arriving and hitting the NAPI state even > when we are actively polling NAPI. > > And this problem was masked by the locking done here. Yes. Ville, can you rule out irq sharing between the 8139 and some other device ? It's a candidate for unexpected interrupt handler invocation with older pc, even with properly working hardware. -- Ueimor
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