Re: [PATCH v2 0/6] mm/fs: gup: don't unmap or drop filesystem buffers

2018-07-01 Thread John Hubbard
On 07/01/2018 05:56 PM, john.hubb...@gmail.com wrote: > From: John Hubbard > There were some typos in patches #4 and #5, which I've fixed locally. Let me know if anyone would like me to repost with those right away, otherwise I'll wait for other review besides the kbuild test robot. Meanwhile,

[PATCH v2 0/6] mm/fs: gup: don't unmap or drop filesystem buffers

2018-07-01 Thread john . hubbard
From: John Hubbard This fixes a few problems that came up when using devices (NICs, GPUs, for example) that want to have direct access to a chunk of system (CPU) memory, so that they can DMA to/from that memory. Problems [1] come up if that memory is backed by persistence storage; for example, an