On Tue, Dec 31, 2019 at 11:55:45AM -0600, Eric Biggers wrote: > From: Eric Biggers <ebiggers@xxxxxxxxxx> > > When initializing an fs-verity hash algorithm, also initialize a mempool > that contains a single preallocated hash request object. Then replace > the direct calls to ahash_request_alloc() and ahash_request_free() with > allocating and freeing from this mempool. > > This eliminates the possibility of the allocation failing, which is > desirable for the I/O path. > > This doesn't cause deadlocks because there's no case where multiple hash > requests are needed at a time to make forward progress. > > Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx> Looks good; feel free to add: Reviewed-by: Theodore Ts'o <tytso@xxxxxxx>
