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Re: [PATCH] r8169: Reduce looping in the interrupt handler.

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From: Francois Romieu
Subject: Re: [PATCH] r8169: Reduce looping in the interrupt handler.
Date: Wednesday, August 26, 2009 - 2:30 pm

Eric W. Biederman <ebiederm@xmission.com> :
[...]

I fear we have some longstanding problem anyway :

1. quiescent state
2. packets are received
3. rtl8169_interrupt schedules napi, clears IntrStatus and exits
4. packets are received and some non-napi event happens
5. rtl8169_interrupt wakes up, reads IntrStatus and goes on...
6. rtl8169_poll wakes up, processes Rx and Tx napi events and goes on...
7. tp->intr_mask still equals ~tp->napi_event : rtl8169_interrupt
   handler does not even try to schedule napi.
8. more packets are received
9. rtl8169_interrupt clears IntrStatus
a. rtl8169_poll reenables napi scheduling, updates IntrMask and exits
b. rtl8169_interrupt reads a perfectly clean IntrStatus and exits

-- 
Ueimor
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Messages in current thread:
Re: 2.6.27.19 + 28.7: network timeouts for r8169 and 8139too, Michael Riepe, (Thu May 14, 12:42 pm)
[PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Fri May 22, 6:29 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Buesch, (Sat May 23, 2:24 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Riepe, (Sat May 23, 7:35 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Buesch, (Sat May 23, 7:44 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Sat May 23, 7:51 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Riepe, (Sat May 23, 8:01 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Riepe, (Sat May 23, 9:12 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Buesch, (Sat May 23, 9:40 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Buesch, (Sat May 23, 9:45 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Sat May 23, 9:46 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Buesch, (Sat May 23, 9:50 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Riepe, (Sat May 23, 9:53 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Sat May 23, 10:03 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Francois Romieu, (Sun May 24, 2:15 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Sun May 24, 3:55 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Miller, (Mon May 25, 10:55 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Buesch, (Tue May 26, 11:22 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Miller, (Tue May 26, 2:52 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Miller, (Tue May 26, 3:14 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Riepe, (Tue May 26, 3:40 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Miller, (Tue May 26, 3:43 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Miller, (Tue May 26, 4:10 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Buesch, (Wed May 27, 9:19 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Rui Santos, (Tue Jun 16, 12:32 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Fri Aug 21, 1:57 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michael Riepe, (Fri Aug 21, 2:22 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Fri Aug 21, 3:59 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Fri Aug 21, 4:34 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Fri Aug 21, 5:24 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Sat Aug 22, 4:48 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Sat Aug 22, 5:07 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Sat Aug 22, 1:43 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Jarek Poplawski, (Sun Aug 23, 10:17 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Michal Soltys, (Sun Aug 23, 10:43 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Jarek Poplawski, (Sun Aug 23, 10:54 am)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Sun Aug 23, 7:37 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Mon Aug 24, 5:51 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Mon Aug 24, 7:59 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Tue Aug 25, 1:22 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Tue Aug 25, 1:40 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Tue Aug 25, 2:24 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Tue Aug 25, 2:37 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Tue Aug 25, 2:46 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, David Dillow, (Tue Aug 25, 2:54 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Francois Romieu, (Tue Aug 25, 3:19 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Francois Romieu, (Tue Aug 25, 4:11 pm)
Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts, Eric W. Biederman, (Tue Aug 25, 8:47 pm)
[PATCH] r8169: Reduce looping in the interrupt handler., Eric W. Biederman, (Wed Aug 26, 12:58 am)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., David Dillow, (Wed Aug 26, 6:56 am)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., David Dillow, (Wed Aug 26, 6:59 am)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Eric W. Biederman, (Wed Aug 26, 1:02 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Francois Romieu, (Wed Aug 26, 2:30 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Eric W. Biederman, (Wed Aug 26, 2:40 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Francois Romieu, (Wed Aug 26, 10:24 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Eric W. Biederman, (Wed Aug 26, 10:38 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Francois Romieu, (Thu Aug 27, 4:20 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Eric W. Biederman, (Thu Aug 27, 6:17 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., David Dillow, (Thu Aug 27, 6:29 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Francois Romieu, (Sun Aug 30, 1:37 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Eric W. Biederman, (Sun Aug 30, 1:53 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., David Dillow, (Mon Aug 31, 8:33 pm)
Re: [PATCH] r8169: Reduce looping in the interrupt handler., Francois Romieu, (Tue Sep 1, 2:20 am)