anonymous map
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Yue Li
Feb 18, 2018, 6:24:16 PM2/18/18
to pmem
Hi,
I'm just wondering if anonymous map can be used with pmdk? Or we have to use file-backed mapping?
Best,
Yue
Piotr Balcer
Feb 19, 2018, 6:33:48 AM2/19/18
to pmem
Hi Yue,
To what end? The entire purpose of the library is to allow applications to resume from previously created persistent state.
If you want to use RAM backed pages, just use a pool located in tmpfs. This will enable you to create/debug applications in the absence of dax-enabled file system and real NVDIMMs.
Having said that, I recommend setting up an emulated pmem device with a DAX file system, here's a blog post describing how to do it:
http://pmem.io/2016/02/22/pm-emulation.html
Piotr
To what end? The entire purpose of the library is to allow applications to resume from previously created persistent state.
If you want to use RAM backed pages, just use a pool located in tmpfs. This will enable you to create/debug applications in the absence of dax-enabled file system and real NVDIMMs.
Having said that, I recommend setting up an emulated pmem device with a DAX file system, here's a blog post describing how to do it:
http://pmem.io/2016/02/22/pm-emulation.html
Piotr
Niall Douglas
Feb 20, 2018, 4:51:57 AM2/20/18
to pmem
If you're looking for throwaway memory which uses the device rather than using RAM, a temporary inode create with O_TMPFILE will do.
Niall
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