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| author | Matthias Goergens <matthias.goergens@gmail.com> | 2024-03-05 15:10:21 +0100 |
|---|---|---|
| committer | Bernd Schubert <bschubert@ddn.com> | 2024-03-07 11:56:04 +0100 |
| commit | bb9cecbf67341e03e53dd36b8f69520f3a26f834 (patch) | |
| tree | cd9ed27fad20dfcdcbce5aa864dd5b846f23476b /test/util.py | |
| parent | 9e35addc358375c9228fcc2d5df780e9f4fef164 (diff) | |
| download | libfuse-bb9cecbf67341e03e53dd36b8f69520f3a26f834.tar.gz | |
Use posix_spawn instead of fork+exec
Client code might allocate a lot of memory before starting the mount.
Fork is slow for processes that are using a lot of memory. But
posix_spawn fixes that.
Another issue with fork is if the process is also doing RDMA - this
might lead to data corruption, as least if memory used for RDMA
is not marked with MADV_DONTFORK. At least with linux kernels
before 5.12.
Also see https://blog.nelhage.com/post/a-cursed-bug/ for more details
Change by Bernd:
This also prepares the new fusermount option "--comm-fd", but keeps
the previous way to pass the parameter as env variable. In a future
release (exact data to be determined) we are going to remove usage
of the env variable and will switch to the new parameter.
Diffstat (limited to 'test/util.py')
0 files changed, 0 insertions, 0 deletions