Le 18/12/2014 13:15, Stephan Mueller a écrit :
Hi Herbert,
While testing the vmsplice/splice interface of algif_hash I was made
aware of the problem that data blobs larger than 16 pages do not seem to
be hashed properly.
For testing, a file is mmap()ed and handed to vmsplice / splice. If the
file is smaller than 2**16, the interface returns the proper hash.
However, when the file is larger, only the first 2**16 bytes seem to be
used.
When adding printk's to hash_sendpage, I see that this function is
invoked exactly 16 times where the first 15 invocations have the
MSG_MORE flag set and the last invocation does not have MSG_MORE.
Hi Stephan,
I have already noticed the same issue and proposed a patch, but I never
got any feedback and it has never been merged, allthought I pinged it a
few times.
See https://lkml.org/lkml/2014/4/18/276
Christophe
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