Re: [patch v2] mremap.2: Add description of old_size == 0 functionality
From: Michal Hocko <mhocko@kernel.org>
Date: 2017-09-25 12:36:25
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On Wed 20-09-17 09:25:42, Michael Kerrisk wrote: [...]
BUGS
Before Linux 4.14, if old_size was zero and the mapping referred
to by old_address was a private mapping (mmap(2) MAP_PRIVATE),
mremap() created a new private mapping unrelated to the original
mapping. This behavior was unintended and probably unexpected in
user-space applications (since the intention of mremap() is to
create a new mapping based on the original mapping). Since Linux
4.14, mremap() fails with the error EINVAL in this scenario.
Does that seem okay?sorry to be late but yes this wording makes perfect sense to me. -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>