* Re: [PATCH 0/3 v3] Fix kdump failures with crashkernel=high [not found] <1433500202-25531-1-git-send-email-joro@8bytes.org> @ 2015-06-05 13:27 ` Borislav Petkov 2015-06-07 13:41 ` Ingo Molnar 0 siblings, 1 reply; 3+ messages in thread From: Borislav Petkov @ 2015-06-05 13:27 UTC (permalink / raw) To: Joerg Roedel, H. Peter Anvin, Ingo Molnar Cc: jroedel, Baoquan He, Konrad Rzeszutek Wilk, x86, kexec, linux-kernel, Thomas Gleixner, Dave Young, Vivek Goyal On Fri, Jun 05, 2015 at 12:29:59PM +0200, Joerg Roedel wrote: > v2->v3 > > * Rebased to v4.1-rc6 > * Updated changelogs as requested and added outcome of > previous discussions > * Added more Acked-bys > > v1->v2: > > * Updated comments based on feedback from Konrad > * Added Acked-bys > * Rebased to v3.19-rc3 > > Hi, > > here is a patch-set to fix failed kdump kernel boots when > the systems was booted with crashkernel=X,high. On those > systems the kernel allocates only 72MiB of low-memory for > DMA buffers, which showed to be too low on some systems. > > The problem is that 64MiB of the low-memory is allocated by > swiotlb, leaving 8MB for the page-allocator. But swiotlb > tries to allocate DMA memory from the page-allocator first, > which fails pretty fast in the boot sequence, causing > warnings. This patch-set removes these warnings. > > But even the 64MiB for swiotlb are eaten up on some systems, > so that the default of low-memory allocated for the > crash-kernel is increase from 72MB to 256MB (only changing > the defaults, can still be overwritten by crashkernel=X,low). > > This number comes from experiments on the affected systems, > 128MiB low-memory was still not enough there, thus I set the > value to 256MiB to fix the issues. > > Any feedback appreciated. > > Thanks, > > Joerg > > Joerg Roedel (3): > swiotlb: Warn on allocation failure in swiotlb_alloc_coherent > x86, swiotlb: Try coherent allocations with __GFP_NOWARN > x86, crash: Allocate enough low-mem when crashkernel=high > > arch/x86/kernel/pci-swiotlb.c | 7 +++++++ > arch/x86/kernel/setup.c | 5 ++++- > lib/swiotlb.c | 11 +++++++++-- > 3 files changed, 20 insertions(+), 3 deletions(-) Looks simple enough, all applied, thanks. hpa, Ingo, any concerns? -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. -- _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH 0/3 v3] Fix kdump failures with crashkernel=high 2015-06-05 13:27 ` [PATCH 0/3 v3] Fix kdump failures with crashkernel=high Borislav Petkov @ 2015-06-07 13:41 ` Ingo Molnar 2015-06-07 14:38 ` Borislav Petkov 0 siblings, 1 reply; 3+ messages in thread From: Ingo Molnar @ 2015-06-07 13:41 UTC (permalink / raw) To: Borislav Petkov Cc: jroedel, Baoquan He, Konrad Rzeszutek Wilk, Joerg Roedel, x86, kexec, linux-kernel, Ingo Molnar, H. Peter Anvin, Thomas Gleixner, Dave Young, Vivek Goyal * Borislav Petkov <bp@alien8.de> wrote: > > Joerg Roedel (3): > > swiotlb: Warn on allocation failure in swiotlb_alloc_coherent > > x86, swiotlb: Try coherent allocations with __GFP_NOWARN > > x86, crash: Allocate enough low-mem when crashkernel=high > > > > arch/x86/kernel/pci-swiotlb.c | 7 +++++++ > > arch/x86/kernel/setup.c | 5 ++++- > > lib/swiotlb.c | 11 +++++++++-- > > 3 files changed, 20 insertions(+), 3 deletions(-) > > Looks simple enough, all applied, thanks. > > hpa, Ingo, any concerns? Modulo a couple of typos it all looks sane. Thanks, Ingo _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH 0/3 v3] Fix kdump failures with crashkernel=high 2015-06-07 13:41 ` Ingo Molnar @ 2015-06-07 14:38 ` Borislav Petkov 0 siblings, 0 replies; 3+ messages in thread From: Borislav Petkov @ 2015-06-07 14:38 UTC (permalink / raw) To: Ingo Molnar Cc: jroedel, Baoquan He, Konrad Rzeszutek Wilk, Joerg Roedel, x86, kexec, linux-kernel, Ingo Molnar, H. Peter Anvin, Thomas Gleixner, Dave Young, Vivek Goyal On Sun, Jun 07, 2015 at 03:41:36PM +0200, Ingo Molnar wrote: > Modulo a couple of typos it all looks sane. Ah yes, I caught a few while applying. I'll send you the final result tomorrow. -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. -- _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec ^ permalink raw reply [flat|nested] 3+ messages in thread
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2015-06-05 13:27 ` [PATCH 0/3 v3] Fix kdump failures with crashkernel=high Borislav Petkov
2015-06-07 13:41 ` Ingo Molnar
2015-06-07 14:38 ` Borislav Petkov
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