Greetings, I tried passing the memmap command as a part of the cmdline variable as well. I just wrote memmap=4G!12G at the end of the string. Even by doing this, I'm still not able to find the pmem partition in /dev. As mentioned earlier, the e820 table is displayed correctly and I can see the persistent (type 12) region reserved but the pmem space is nowhere to be found. Is there anything else I'm missing?
On Sat, May 20, 2023 at 4:19 PM Vincent Abraham <vincent....@gmail.com> wrote: > Greetings, > Thanks for responding. Could you tell me what exactly do you mean by > 'building it into the kernel directly'? I've changed the kernel > configuration to reflect PMEM as a module and all of the other changes that > are done in the website. I didn't pass the memmap argument yet, I just > reserved memory with the X86E820() function in the gem5 configuration file > and that did the job of the table displaying correctly. I'll try passing > the command to the argument directly > > On Sat, 20 May 2023, 13:29 Poremba, Matthew, <matthew.pore...@amd.com> > wrote: > >> [AMD Official Use Only - General] >> >> Hi, >> >> >> >> >> >> Are you building pmem as a module as described in the blog? (“<M> PMEM: >> Persistent memory block device support”) If so, I would try building it >> into the kernel directly. It is possibly looking for the module for your >> compiled kernel and does not find it on the disk image. >> >> >> >> You’ll also have to add “memmap=4G!12G” to cmdline variable in the >> makeLinuxX86System function in configs/common/FSConfig.py if you are using >> fs.py. >> >> >> >> >> >> -Matt >> >> >> >> *From:* Vincent Abraham via gem5-users <gem5-users@gem5.org> >> *Sent:* Saturday, May 20, 2023 9:14 AM >> *To:* gem5-users@gem5.org >> *Cc:* Vincent Abraham <vincent....@gmail.com> >> *Subject:* [gem5-users] Persistent memory with gem5 >> >> >> >> *Caution:* This message originated from an External Source. Use proper >> caution when opening attachments, clicking links, or responding. >> >> >> >> I want to configure persistent memory in the RAM (similar to >> https://pmem.io/blog/2016/02/how-to-emulate-persistent-memory/) and just >> run a basic FS setup (I'm running fs.py for now). I'm able to reserve >> the persistent memory space (with the X86E820Entry() function in the config >> file) and the e820 table is displayed correctly. But on booting up, I can't >> find any disk named pmem in /dev. Is there anything that I'm missing out >> here? Any help with this would be much appreciated. >> >
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