Re: [PATCH] x86/kdump: Fix 'kmem -s' reported an invalid freepointer when SME was active

2019-10-05 Thread lijiang
在 2019年10月01日 15:40, Baoquan He 写道: > On 09/30/19 at 05:14am, Eric W. Biederman wrote: >> Baoquan He writes: needs a little better description. I know it is not a lot on modern systems but reserving an extra 1M of memory to avoid having to special case it later seems in need of

Re: [PATCH] x86/kdump: Fix 'kmem -s' reported an invalid freepointer when SME was active

2019-10-01 Thread Baoquan He
On 09/30/19 at 05:14am, Eric W. Biederman wrote: > Baoquan He writes: > >> needs a little better description. I know it is not a lot on modern > >> systems but reserving an extra 1M of memory to avoid having to special > >> case it later seems in need of calling out. > >> > >> I have an old

Re: [PATCH] x86/kdump: Fix 'kmem -s' reported an invalid freepointer when SME was active

2019-09-30 Thread Eric W. Biederman
Baoquan He writes: > On 09/27/19 at 09:32pm, Eric W. Biederman wrote: >> Baoquan He writes: >> >> > On 09/27/19 at 03:49pm, Eric W. Biederman wrote: >> >> Dave Young writes: >> >> >> In order to avoid such problem, lets occupy the first 640k region when >> >> >> SME is active, which will

Re: [PATCH] x86/kdump: Fix 'kmem -s' reported an invalid freepointer when SME was active

2019-09-27 Thread Baoquan He
On 09/27/19 at 09:32pm, Eric W. Biederman wrote: > Baoquan He writes: > > > On 09/27/19 at 03:49pm, Eric W. Biederman wrote: > >> Dave Young writes: > >> >> In order to avoid such problem, lets occupy the first 640k region when > >> >> SME is active, which will ensure that the allocated memory

Re: [PATCH] x86/kdump: Fix 'kmem -s' reported an invalid freepointer when SME was active

2019-09-27 Thread Eric W. Biederman
Baoquan He writes: > On 09/27/19 at 03:49pm, Eric W. Biederman wrote: >> Dave Young writes: >> >> In order to avoid such problem, lets occupy the first 640k region when >> >> SME is active, which will ensure that the allocated memory does not fall >> >> into the first 640k area. So, no need to

Re: [PATCH] x86/kdump: Fix 'kmem -s' reported an invalid freepointer when SME was active

2019-09-27 Thread Baoquan He
On 09/27/19 at 03:49pm, Eric W. Biederman wrote: > Dave Young writes: > >> In order to avoid such problem, lets occupy the first 640k region when > >> SME is active, which will ensure that the allocated memory does not fall > >> into the first 640k area. So, no need to worry about whether kernel

Re: [PATCH] x86/kdump: Fix 'kmem -s' reported an invalid freepointer when SME was active

2019-09-27 Thread Baoquan He
On 09/27/19 at 03:49pm, Eric W. Biederman wrote: > >> In order to avoid such problem, lets occupy the first 640k region when > >> SME is active, which will ensure that the allocated memory does not fall > >> into the first 640k area. So, no need to worry about whether kernel can > >> correctly

Re: [PATCH] x86/kdump: Fix 'kmem -s' reported an invalid freepointer when SME was active

2019-09-27 Thread Eric W. Biederman
Dave Young writes: > Hi Lianbo, > > For kexec/kdump patches, please remember to cc kexec list next time. > Also it is definitely kdump specific issue, I added Vivek and Eric in > cc. > > On 09/20/19 at 11:53am, Lianbo Jiang wrote: >> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204793