Create threads in detached state in userspace #991
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Currently, thread_create(), when called in userspace, creates a
joinable (i.e. not detached thread). This is the pthread default.
Unfortunately, this does not reproduce kthreads behavior (kthreads
are always detached). In addition, this contradicts the original
Solaris code which creates userspace threads in detached mode.
These joinable threads are never joined, which leads to a leakage of
pthread thread objects ("zombie threads"). This in turn results in
excessive ressource consumption, and possible ressource exhaustion in
extreme cases (e.g. long ztest runs).
This patch fixes the issue by creating userspace threads in detached
mode. The only exception is ztest worker threads which are meant to be
joinable.
See issue openzfs#989.
This was referenced Sep 27, 2012
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Merged as commit 0aebd4f |
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Sep 26, 2023
) Bumps [sysinfo](https://github.com/GuillaumeGomez/sysinfo) from 0.29.2 to 0.29.4. - [Changelog](https://github.com/GuillaumeGomez/sysinfo/blob/master/CHANGELOG.md) - [Commits](https://github.com/GuillaumeGomez/sysinfo/commits) --- updated-dependencies: - dependency-name: sysinfo dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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Currently,
thread_create(), when called in userspace, creates a joinable (i.e. not detached) thread. This is the pthread default.Unfortunately, this does not reproduce kthreads behavior (kthreads are always detached). In addition, this contradicts the original Solaris code which creates userspace threads in detached mode.
These joinable threads are never joined, which leads to a leakage of pthread thread objects ("zombie threads"). This in turn results in excessive ressource consumption, and possible ressource exhaustion in extreme cases (e.g. long ztest runs).
This patch fixes the issue by creating userspace threads in detached mode. The only exception is ztest worker threads which are meant to be joinable.
See issue #989.