Re: [PATCH v7 20/21] PCI/P2PDMA: Introduce pci_mmap_p2pmem()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Jul 05, 2022 at 10:51:02AM -0300, Jason Gunthorpe wrote:
> > In fact I'm not even sure this should be a character device, it seems
> > to fit it way better with the PCI sysfs hierchacy, just like how we
> > map MMIO resources, which these are anyway.  And once it is on sysfs
> > we do have a uniqueue inode and need none of the pseudofs stuff, and
> > don't need all the glue code in nvme either.
> 
> Shouldn't there be an allocator here? It feels a bit weird that the
> entire CMB is given to a single process, it is a sharable resource,
> isn't it?

Making the entire area given by the device to the p2p allocator available
to user space seems sensible to me.  That is what the current series does,
and what a sysfs interface would do as well.



[Index of Archives]     [DMA Engine]     [Linux Coverity]     [Linux USB]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Greybus]

  Powered by Linux