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Re: atl1 64-bit => 32-bit DMA borkage (reproducible, bisected)

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From: Alexey Dobriyan <adobriyan@...>
To: Jay Cliburn <jacliburn@...>
Cc: Luca Tettamanti <kronos.it@...>, Chris Snook <csnook@...>, Jeff Garzik <jeff@...>, Pekka Enberg <penberg@...>, Andrew Morton <akpm@...>, <linux-kernel@...>, <netdev@...>, Christoph Lameter <clameter@...>, <torvalds@...>
Subject: Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected)
Date: Sunday, May 4, 2008 - 5:15 pm

Looking at how other netdevice drivers:

8139too and others checks netif_running() in interrupt handler.

r8169 has scary "50k$" question comment re irqs disabled after
interacting with hardware.

But the r8169 case should be fixed by atlx_irq_disable()?

Writes to REG_IMR, REG_ISR are commented in atl1_reset_hw(), why?
(I'll test that soon)

Do we have a theory why changing from 64-bit DMA mask to 32-bit mask
resurrects the bug? NIC here never showed any sort of corruption
described in commit which banned 64-bit DMA.

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2.6.25-rc8-mm2, Andrew Morton, (Thu Apr 10, 11:33 pm)
BUG at __dentry_open [Was: 2.6.25-rc8-mm2], Jiri Slaby, (Mon Apr 14, 4:07 am)
2.6.25-rc8-mm2 - CONFIG_PROFILE_LIKELY broke again..., , (Sat Apr 12, 4:52 am)
2.6.25-rc8-mm2, , (Sat Apr 12, 5:41 am)
2.6.25-rc8-mm2: IP: [&lt;ffffffff802868f9&gt;] __kmalloc+0x69/0x110, Alexey Dobriyan, (Sun Apr 13, 4:44 pm)
Re: 2.6.25-rc8-mm2: IP: [&lt;ffffffff802868f9&gt;] __kmalloc..., Pekka J Enberg, (Mon Apr 14, 5:51 am)
Re: 2.6.25-rc8-mm2: IP: [&lt;ffffffff802868f9&gt;] __kmalloc..., Pekka Enberg, (Mon Apr 14, 12:01 pm)
Re: 2.6.25-rc8-mm2: IP: [&lt;ffffffff802868f9&gt;] __kmalloc..., Christoph Lameter, (Mon Apr 14, 1:53 pm)
Re: 2.6.25-rc8-mm2: IP: [&lt;ffffffff802868f9&gt;] __kmalloc..., Christoph Lameter, (Mon Apr 14, 1:57 pm)
Re: 2.6.25-rc8-mm2: IP: [&lt;ffffffff802868f9&gt;] __kmalloc..., Alexey Dobriyan, (Mon Apr 14, 2:32 pm)
2.6.25-rc8-mm2: FIX kmalloc-2048 (was Re: 2.6.25-rc8-mm2: IP..., Alexey Dobriyan, (Mon Apr 14, 3:56 pm)
Re: 2.6.25-rc8-mm2: FIX kmalloc-2048 (was Re: 2.6.25-rc8-mm2..., Christoph Lameter, (Mon Apr 14, 4:05 pm)
Re: 2.6.25-rc8-mm2: FIX kmalloc-2048 (was Re: 2.6.25-rc8-mm2..., Alexey Dobriyan, (Sat Apr 19, 7:17 am)
atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Sat Apr 19, 10:45 am)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Jay Cliburn, (Sat Apr 19, 10:54 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Sun Apr 20, 7:14 am)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Jay Cliburn, (Sun Apr 20, 7:06 am)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Sun Apr 20, 8:26 am)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Jay Cliburn, (Sun Apr 20, 2:37 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Sun Apr 20, 4:55 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Chris Snook, (Mon Apr 21, 2:42 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Mon Apr 21, 3:56 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Jay Cliburn, (Mon Apr 21, 10:08 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Jay Cliburn, (Fri Apr 25, 8:57 pm)
Re: atl1 64-bit => 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Sun May 4, 5:15 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Jay Cliburn, (Tue May 6, 12:02 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Fri May 9, 3:51 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Chris Snook, (Fri May 9, 2:56 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Fri May 9, 4:07 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Jay Cliburn, (Fri May 9, 3:38 pm)
[PATCH] Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducib..., Alexey Dobriyan, (Sat May 10, 3:31 pm)
Re: [PATCH] Re: atl1 64-bit =&gt; 32-bit DMA borkage (reprod..., Jay Cliburn, (Sat May 10, 9:58 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Jay Cliburn, (Sun May 4, 8:31 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Jay Cliburn, (Sun May 4, 8:34 pm)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Mon Apr 28, 2:42 am)
Re: atl1 64-bit =&gt; 32-bit DMA borkage (reproducible, bisected), Alexey Dobriyan, (Tue Apr 22, 3:02 pm)
Re: 2.6.25-rc8-mm2: IP: [&lt;ffffffff802868f9&gt;] __kmalloc..., Andrew Morton, (Sun Apr 13, 4:53 pm)
Re: 2.6.25-rc8-mm2: IP: [&lt;ffffffff802868f9&gt;] __kmalloc..., Christoph Lameter, (Mon Apr 14, 2:00 pm)
Re: 2.6.25-rc8-mm2: IP: [&lt;ffffffff802868f9&gt;] __kmalloc..., Pekka Enberg, (Mon Apr 14, 12:18 pm)
2.6.25-rc8-mm2: panic involving mount_block_root and down th..., Alexey Dobriyan, (Fri Apr 11, 7:43 pm)
Re: 2.6.25-rc8-mm2: CONFIG_ATA_SFF: panic involving mount_bl..., Alexey Dobriyan, (Fri Apr 11, 8:59 pm)
Re: 2.6.25-rc8-mm2: CONFIG_ATA_SFF: panic involving mount_bl..., Adrian Bunk, (Sat Apr 12, 2:52 am)
Re: 2.6.25-rc8-mm2: CONFIG_ATA_SFF: panic involving mount_bl..., Jeff Garzik, (Sat Apr 12, 6:02 am)
Re: 2.6.25-rc8-mm2: CONFIG_ATA_SFF: panic involving mount_bl..., Tejun Heo, (Sat Apr 12, 8:45 pm)
[mm patch] select ATA_SFF, Adrian Bunk, (Sat Apr 12, 8:51 pm)
Re: 2.6.25-rc8-mm2, KAMEZAWA Hiroyuki, (Fri Apr 11, 5:57 am)
Re: 2.6.25-rc8-mm2, KAMEZAWA Hiroyuki, (Fri Apr 11, 6:23 am)
Re: 2.6.25-rc8-mm2, Pekka Enberg, (Fri Apr 11, 6:34 am)
Re: 2.6.25-rc8-mm2, KAMEZAWA Hiroyuki, (Fri Apr 11, 6:57 am)
Re: 2.6.25-rc8-mm2, KAMEZAWA Hiroyuki, (Fri Apr 11, 7:17 am)
Re: 2.6.25-rc8-mm2, KAMEZAWA Hiroyuki, (Fri Apr 11, 9:17 am)
Re: 2.6.25-rc8-mm2, Pekka Enberg, (Fri Apr 11, 10:24 am)
Re: 2.6.25-rc8-mm2, KAMEZAWA Hiroyuki, (Sun Apr 13, 11:13 pm)
Re: 2.6.25-rc8-mm2, Adrian Bunk, (Fri Apr 11, 9:40 am)
Re: 2.6.25-rc8-mm2, Andrew Morton, (Sat Apr 12, 12:22 am)
Re: 2.6.25-rc8-mm2, Aneesh Kumar K.V, (Sat Apr 12, 2:43 pm)
Re: 2.6.25-rc8-mm2, Michael Schmitz, (Sun Apr 13, 3:45 am)
Re: 2.6.25-rc8-mm2, Geert Uytterhoeven, (Sun Apr 13, 4:11 am)
2.6.25-rc8-mm2: boot hang after "ACPI: using IOAPIC for inte..., Alexey Dobriyan, (Fri Apr 11, 2:29 am)
Re: 2.6.25-rc8-mm2: boot hang after "ACPI: using IOAPIC for ..., Pekka Enberg, (Fri Apr 11, 2:43 am)
Re: 2.6.25-rc8-mm2: boot hang after "ACPI: using IOAPIC for ..., Pekka Enberg, (Fri Apr 11, 6:35 am)
Re: 2.6.25-rc8-mm2: boot hang after "ACPI: using IOAPIC for ..., Alexey Dobriyan, (Fri Apr 11, 5:07 pm)
Re: 2.6.25-rc8-mm2: boot hang after "ACPI: using IOAPIC for ..., Pekka J Enberg, (Fri Apr 11, 5:25 pm)
Re: 2.6.25-rc8-mm2: boot hang after "ACPI: using IOAPIC for ..., Alexey Dobriyan, (Fri Apr 11, 7:09 pm)
2.6.25-rc8-mm2: boot hang after "ACPI: using IOAPIC for inte..., Alexey Dobriyan, (Fri Apr 11, 2:28 am)
Re: 2.6.25-rc8-mm2, , (Sat Apr 12, 1:53 am)
Re: 2.6.25-rc8-mm2, Andrew Morton, (Sat Apr 12, 2:07 am)
Re: 2.6.25-rc8-mm2: Observed problems: Not a detailed bug re..., Zan Lynx, (Tue Apr 15, 1:00 pm)
Re: 2.6.25-rc8-mm2: Observed problems: Not a detailed bug re..., Andrew Morton, (Tue Apr 15, 2:42 pm)
Re: 2.6.25-rc8-mm2: Observed problems: Not a detailed bug re..., Rafael J. Wysocki, (Tue Apr 15, 4:12 pm)
2.6.25-rc8-mm2 - ftraced chews 100% of a CPU, , (Sat Apr 12, 6:47 am)