Re: BUG: Mellanox crash with iommu=soft and swiotlb=force
Hi, On Tue, Sep 29, 2015 at 12:59:35AM +0300, Or Gerlitz wrote: > On Tue, Sep 29, 2015 at 12:04 AM, Christoffer Dall > <christoffer.d...@linaro.org> wrote: > > Hi, > > > > In doing some performance experiments I found that using a 10G Mellanox > > MX354A Dual port FDR CX3 device on a server running Apache and running > > ab against that server causes the system to crash with 'iommu=soft > > swiotlb=force'. The same behavior is seen without these options on Dom0 > > running under Xen. > > > > I have tried this on v4.0 and v4.3-rc3. > > Woops, needs looking indeed. Unfortunately many people in the team are > off for the Sukkot holiday with real backing to business coming to > play on Oct 6th -- not sure we can really respond on that before. > Friendly reminder on this one. Did anyone have a look? Thanks, -Christoffer -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: BUG: Mellanox crash with iommu=soft and swiotlb=force
On Tue, Sep 29, 2015 at 12:59:35AM +0300, Or Gerlitz wrote: > On Tue, Sep 29, 2015 at 12:04 AM, Christoffer Dall > <christoffer.d...@linaro.org> wrote: > > Hi, > > > > In doing some performance experiments I found that using a 10G Mellanox > > MX354A Dual port FDR CX3 device on a server running Apache and running > > ab against that server causes the system to crash with 'iommu=soft > > swiotlb=force'. The same behavior is seen without these options on Dom0 > > running under Xen. > > > > I have tried this on v4.0 and v4.3-rc3. > > Woops, needs looking indeed. Unfortunately many people in the team are > off for the Sukkot holiday with real backing to business coming to > play on Oct 6th -- not sure we can really respond on that before. > > Are you running over ARM? which? if not, is that x86 64bit? > I'm running on x86_64. Thanks, -Christoffer -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
BUG: Mellanox crash with iommu=soft and swiotlb=force
Hi, In doing some performance experiments I found that using a 10G Mellanox MX354A Dual port FDR CX3 device on a server running Apache and running ab against that server causes the system to crash with 'iommu=soft swiotlb=force'. The same behavior is seen without these options on Dom0 running under Xen. I have tried this on v4.0 and v4.3-rc3. Examples of crashes: http://pastebin.ubuntu.com/11953498/ http://pastebin.ubuntu.com/11953443/ Kernel config (v4.3): http://paste.ubuntu.com/12605446/ To reproduce, host a file in apache server on a system with the Mellanox NIC (I used the 41K index file of the GCC manual) and run ab (apache bench) from a client machine, something like this: $ ab -n 10 -c 100 http://10.10.1.2/gcc/index.html I'm afraid debugging this is out of my area of expertise. Is this something you could have a look at? Thanks, -Christoffer -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH] KVM: Add Kconfig option to signal cross-endian guests
On Thu, Jul 09, 2015 at 09:49:05AM +0200, Thomas Huth wrote: The option for supporting cross-endianness legacy guests in the vhost and tun code should only be available on systems that support cross-endian guests. Signed-off-by: Thomas Huth th...@redhat.com Acked-by: Christoffer Dall christoffer.d...@linaro.org -- To unsubscribe from this list: send the line unsubscribe netdev in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
