Messages in this thread | | | Date | Thu, 19 Sep 2019 05:11:28 +0800 | From | Gao Xiang <> | Subject | Re: [GIT PULL] Staging/IIO driver patches for 5.4-rc1 |
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Hi Christoph,
On Wed, Sep 18, 2019 at 11:24:12AM -0700, Christoph Hellwig wrote: > Just as a note of record: I don't think either file system move > is a good idea. erofs still needs a lot of work, especially in > interacting with the mm code like abusing page->mapping.
I know what you mean, that is a known stuff in the TODO list, Z_EROFS_MAPPING_STAGING page->mapping just be used as a temporary page mark since page->private is already pointed to another structure, It's now be marked as an non-movable and anon pseudo mapping and most mm code just skip this case.
I think a better way is to use a real address_space structure for page->mapping to point. It's easy to update but I need some time to verify. If I am wrong, please point it out...
Thanks, Gao Xiang
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