On my v891w, i add "memmap=1M!2047M ramoops.mem_size=1048576 ramoops.ecc=1 ramoops.mem_address=0x7ff00000 ramoops.console_size=16384 ramoops.ftrace_size=16384 ramoops.pmsg_size=16384 ramoops.record_size=32768" boot parameter, [ 0.483935] printk: console [pstore-1] enabled [ 0.484034] pstore: Registered ramoops as persistent store backend [ 0.484121] ramoops: using 0x100000@0x7ff00000, ecc: 16 But on my ezpad 6 m4, i add "memmap=1M!4095M ramoops.mem_size=1048576 ramoops.ecc=1 ramoops.mem_address=0xfff00000 ramoops.console_size=16384 ramoops.ftrace_size=16384 ramoops.pmsg_size=16384 ramoops.record_size=32768" boot parameter, it can't boot, stop at "boot command list", no anyting happen, no dmesg. I test boot parameter one by one, just add ramoops.mem_size=1048576, will cause can't boot. youling 257 <youling257@xxxxxxxxx> 于2019年10月21日周一 下午6:22写道： > > When add cmdline memmap=1M!2047M, the iomem will be 7ef00001-7fefffff : RAM buffer 7ff00000-7fffffff : Persistent Memory (legacy) 7ff00000-7ff00fff : MSFT0101:00, > so ramoops.mem_address=0x7ff00000. > > Lukas Odzioba <lukas.odzioba@xxxxxxxxx> 于 2019年10月21日周一 下午4:39写道： >> >> youling257 <youling257@xxxxxxxxx> wrote: >> > >> > I don't know my ramoops.mem_address, please help me. >> > >> > what is ramoops.mem_address? >> >> It is a Linux kernel parameter, see documentation below: >> https://www.kernel.org/doc/Documentation/admin-guide/ramoops.rst >> >> It requires memory which can hold data between reboots, so i'm not >> sure how it will suit your case. >> >> Thanks, >> Lukas
