On 2022/3/17 10:38, Baoquan He wrote: > On 02/27/22 at 11:07am, Zhen Lei wrote: >> From: Chen Zhou <chenzhou10@xxxxxxxxxx> >> >> There are following issues in arm64 kdump: >> 1. We use crashkernel=X to reserve crashkernel below 4G, which >> will fail when there is no enough low memory. >> 2. If reserving crashkernel above 4G, in this case, crash dump >> kernel will boot failure because there is no low memory available > ~~ change it to "get boot failure" or "fail to boot" OK. I'm going to use "fail to boot". >> for allocation. >> >> To solve these issues, change the behavior of crashkernel=X and >> introduce crashkernel=X,[high,low]. crashkernel=X tries low allocation >> in DMA zone, and fall back to high allocation if it fails. >> We can also use "crashkernel=X,high" to select a region above DMA zone, >> which also tries to allocate at least 256M in DMA zone automatically. >> "crashkernel=Y,low" can be used to allocate specified size low memory. >> >> Signed-off-by: Chen Zhou <chenzhou10@xxxxxxxxxx> >> Co-developed-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx> >> Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx> > > . > -- Regards, Zhen Lei
