Re: [PATCH -next v3 2/2] docs: kdump: Update the crashkernel description for riscv
On 2023/4/7 6:02, Chen Jiahao wrote: > Now "crashkernel=" parameter on riscv has been updated to support > crashkernel=X,[high,low]. Through which we can reserve memory region > above/within 32bit addressible DMA zone. > > Here update the parameter description accordingly. Reviewed-by: Zhen Lei > > Signed-off-by: Chen Jiahao > --- > Documentation/admin-guide/kernel-parameters.txt | 15 --- > 1 file changed, 8 insertions(+), 7 deletions(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt > b/Documentation/admin-guide/kernel-parameters.txt > index 54702bd488eb..41865aae9eaa 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -866,7 +866,7 @@ > memory region [offset, offset + size] for that kernel > image. If '@offset' is omitted, then a suitable offset > is selected automatically. > - [KNL, X86-64, ARM64] Select a region under 4G first, and > + [KNL, X86-64, ARM64, RISCV] Select a region under 4G > first, and > fall back to reserve region above 4G when '@offset' > hasn't been specified. > See Documentation/admin-guide/kdump/kdump.rst for > further details. > @@ -879,14 +879,14 @@ > Documentation/admin-guide/kdump/kdump.rst for an > example. > > crashkernel=size[KMG],high > - [KNL, X86-64, ARM64] range could be above 4G. Allow > kernel > - to allocate physical memory region from top, so could > - be above 4G if system have more than 4G ram installed. > - Otherwise memory region will be allocated below 4G, if > - available. > + [KNL, X86-64, ARM64, RISCV] range could be above 4G. > + Allow kernel to allocate physical memory region from > top, > + so could be above 4G if system have more than 4G ram > + installed. Otherwise memory region will be allocated > + below 4G, if available. > It will be ignored if crashkernel=X is specified. > crashkernel=size[KMG],low > - [KNL, X86-64, ARM64] range under 4G. When > crashkernel=X,high > + [KNL, X86-64, ARM64, RISCV] range under 4G. When > crashkernel=X,high > is passed, kernel could allocate physical memory region > above 4G, that cause second kernel crash on system > that require some amount of low memory, e.g. swiotlb > @@ -897,6 +897,7 @@ > size is platform dependent. > --> x86: max(swiotlb_size_or_default() + 8MiB, 256MiB) > --> arm64: 128MiB > + --> riscv: 128MiB > This one lets the user specify own low range under 4G > for second kernel instead. > 0: to disable low allocation. > -- Regards, Zhen Lei ___ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
Re: [PATCH -next v3 2/2] docs: kdump: Update the crashkernel description for riscv
On Fri, Apr 07, 2023 at 06:02:06AM +0800, Chen Jiahao wrote: > Now "crashkernel=" parameter on riscv has been updated to support > crashkernel=X,[high,low]. Through which we can reserve memory region > above/within 32bit addressible DMA zone. > > Here update the parameter description accordingly. > > Signed-off-by: Chen Jiahao Reviewed-by: Simon Horman ___ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
Re: [PATCH -next v3 2/2] docs: kdump: Update the crashkernel description for riscv
Reviewed-by: Guo Ren On Thu, Apr 6, 2023 at 10:05 PM Chen Jiahao wrote: > > Now "crashkernel=" parameter on riscv has been updated to support > crashkernel=X,[high,low]. Through which we can reserve memory region > above/within 32bit addressible DMA zone. > > Here update the parameter description accordingly. > > Signed-off-by: Chen Jiahao > --- > Documentation/admin-guide/kernel-parameters.txt | 15 --- > 1 file changed, 8 insertions(+), 7 deletions(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt > b/Documentation/admin-guide/kernel-parameters.txt > index 54702bd488eb..41865aae9eaa 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -866,7 +866,7 @@ > memory region [offset, offset + size] for that kernel > image. If '@offset' is omitted, then a suitable offset > is selected automatically. > - [KNL, X86-64, ARM64] Select a region under 4G first, > and > + [KNL, X86-64, ARM64, RISCV] Select a region under 4G > first, and > fall back to reserve region above 4G when '@offset' > hasn't been specified. > See Documentation/admin-guide/kdump/kdump.rst for > further details. > @@ -879,14 +879,14 @@ > Documentation/admin-guide/kdump/kdump.rst for an > example. > > crashkernel=size[KMG],high > - [KNL, X86-64, ARM64] range could be above 4G. Allow > kernel > - to allocate physical memory region from top, so could > - be above 4G if system have more than 4G ram installed. > - Otherwise memory region will be allocated below 4G, if > - available. > + [KNL, X86-64, ARM64, RISCV] range could be above 4G. > + Allow kernel to allocate physical memory region from > top, > + so could be above 4G if system have more than 4G ram > + installed. Otherwise memory region will be allocated > + below 4G, if available. > It will be ignored if crashkernel=X is specified. > crashkernel=size[KMG],low > - [KNL, X86-64, ARM64] range under 4G. When > crashkernel=X,high > + [KNL, X86-64, ARM64, RISCV] range under 4G. When > crashkernel=X,high > is passed, kernel could allocate physical memory > region > above 4G, that cause second kernel crash on system > that require some amount of low memory, e.g. swiotlb > @@ -897,6 +897,7 @@ > size is platform dependent. > --> x86: max(swiotlb_size_or_default() + 8MiB, > 256MiB) > --> arm64: 128MiB > + --> riscv: 128MiB > This one lets the user specify own low range under 4G > for second kernel instead. > 0: to disable low allocation. > -- > 2.31.1 > -- Best Regards Guo Ren ___ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
[PATCH -next v3 2/2] docs: kdump: Update the crashkernel description for riscv
Now "crashkernel=" parameter on riscv has been updated to support crashkernel=X,[high,low]. Through which we can reserve memory region above/within 32bit addressible DMA zone. Here update the parameter description accordingly. Signed-off-by: Chen Jiahao --- Documentation/admin-guide/kernel-parameters.txt | 15 --- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 54702bd488eb..41865aae9eaa 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -866,7 +866,7 @@ memory region [offset, offset + size] for that kernel image. If '@offset' is omitted, then a suitable offset is selected automatically. - [KNL, X86-64, ARM64] Select a region under 4G first, and + [KNL, X86-64, ARM64, RISCV] Select a region under 4G first, and fall back to reserve region above 4G when '@offset' hasn't been specified. See Documentation/admin-guide/kdump/kdump.rst for further details. @@ -879,14 +879,14 @@ Documentation/admin-guide/kdump/kdump.rst for an example. crashkernel=size[KMG],high - [KNL, X86-64, ARM64] range could be above 4G. Allow kernel - to allocate physical memory region from top, so could - be above 4G if system have more than 4G ram installed. - Otherwise memory region will be allocated below 4G, if - available. + [KNL, X86-64, ARM64, RISCV] range could be above 4G. + Allow kernel to allocate physical memory region from top, + so could be above 4G if system have more than 4G ram + installed. Otherwise memory region will be allocated + below 4G, if available. It will be ignored if crashkernel=X is specified. crashkernel=size[KMG],low - [KNL, X86-64, ARM64] range under 4G. When crashkernel=X,high + [KNL, X86-64, ARM64, RISCV] range under 4G. When crashkernel=X,high is passed, kernel could allocate physical memory region above 4G, that cause second kernel crash on system that require some amount of low memory, e.g. swiotlb @@ -897,6 +897,7 @@ size is platform dependent. --> x86: max(swiotlb_size_or_default() + 8MiB, 256MiB) --> arm64: 128MiB + --> riscv: 128MiB This one lets the user specify own low range under 4G for second kernel instead. 0: to disable low allocation. -- 2.31.1 ___ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
