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Message-ID: <CAE9FiQVM-Rd82n-qhasDCA0+-n6TWH6m9Vm6N1nER__5p34z-Q@mail.gmail.com> Date: Fri, 4 Jan 2013 14:10:25 -0800 From: Yinghai Lu <yinghai@...nel.org> To: Shuah Khan <shuahkhan@...il.com> Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, Andrew Morton <akpm@...ux-foundation.org>, Borislav Petkov <bp@...en8.de>, Jan Kiszka <jan.kiszka@....de>, Jason Wessel <jason.wessel@...driver.com>, linux-kernel@...r.kernel.org, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, Joerg Roedel <joro@...tes.org> Subject: Re: [PATCH v7u1 26/31] x86: Don't enable swiotlb if there is not enough ram for it On Fri, Jan 4, 2013 at 1:02 PM, Shuah Khan <shuahkhan@...il.com> wrote: > Pani'cing the system doesn't sound like a good option to me in this > case. This change to disable swiotlb is made for kdump. However, with > this change several system fail to boot, unless crashkernel_low=72M is > specified. this patchset is new feature to put second kdump kernel above 4G. > > I would the say the right approach to solve this would be to not > change the current pci_swiotlb_detect_override() behavior and treat > swiotlb =1 upon entry equivalent to swiotlb_force set. that will make intel system have to take crashkernel_low=72M too. otherwise intel system will get panic during swiotlb allocation. Thanks Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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