Miklos Szeredi wrote:
This function is called from everywhere, and so, it looks like it should
use SLAB_NOFS rather than SLAB_KERNEL. I would audit every GFP_KERNEL
and SLAB_KERNEL usage, and consider replacing with SLAB_NOFS or GFP_NOFS.
GFP_NOFS doesn't make much sense, since mm never calls back into FUSE
anyway: FUSE writes through the page-cache, and hence never dirties
any pages.
I'll add a comment to fuse_request_alloc().
If you're using loop, particularly something insane like swapping over
loop, "the path" will certainly want to know that its passing through
the VFS layer, regardless of specific page cache behavior, AFAICS.
Jeff
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