Messages in this thread | | | Date | Thu, 21 Jan 2010 22:02:21 +0100 | From | Jarek Poplawski <> | Subject | Re: [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync |
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On Thu, Jan 21, 2010 at 03:46:50PM -0500, Michael Breuer wrote: > On 1/21/2010 3:41 PM, Jarek Poplawski wrote: > >On Thu, Jan 21, 2010 at 02:59:19PM -0500, Michael Breuer wrote: > >>Test notes: > >> > >>1) Warning previously apparent on start (dma_debug check_sync) with > >>CONFIG_DMAR=n is gone. > >>2) W/o the above patch, I was getting sky2 DMAR errors and > >>subsequent TX hangs requiring reboot to clear. The hangs happened > >>after at least 12 hours of uptime, and under RX load at the time of > >>the hang. > >>3) With the above patch (and no other changes) I have not been able > >>to recreate the crash - the system is stable. > >Btw, could you remind us if during last dmar bugs jumbo frames might > >have been used or maybe mtu was changed, and the current test setting? > > > I've hit this with and without Jumbo frames enabled. Last couple of > recreations were with mtu = 1500, which is how I'm running now. > >>I have been following the discussion about the DMA api would suggest > >>that the length issue when DMAR is enabled is less innocuous than > >>previously believed. > >Actually, the last conclusions are - it's more innocuous than ever > >believed, and I completely agree with this (at least until the next > >week ;-). > I stand grammatically corrected.
I didn't mean anything grammatical, sorry! (Except, it's equally complex ;-)
Jarek P.
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