Re: [PATCH v7 2/3] btrfs: always uses root memcgroup for filemap_add_folio()

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On Sat 20-07-24 07:41:19, Qu Wenruo wrote:
[...]
> So according to the trend, I'm pretty sure VFS people will reject such
> new interface just to skip accounting.

I would just give it a try with your usecase described. If this is a
nogo then the root cgroup workaround is still available.

> Thus the GFP_NO_ACCOUNT solution looks more feasible.

So we have GFP_ACCOUNT to opt in for accounting and now we should be
adding GFP_NO_ACCOUNT to override it? This doesn't sound like a good use
of gfp flags (which we do not have infinitely) and it is also quite
confusing TBH.
-- 
Michal Hocko
SUSE Labs




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