https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271402
Bug ID: 271402
Summary: graid3 appears to implement BIO_DELETE but does not
advertise GEOM::candelete support
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Looking at the code suggests that graid3 might support BIO_DELETE requests, but
it unconditionally returns EOPNOTSUPP in response to BIO_GETATTR. Hence, when
UFS (or userspace tools like trim) attempt to use TRIM/UNMAP, the check for
GEOM::candelete fails and the operation is treated as unsupported.
This is unfortunate given that it presents a major obstacle for using SSDs with
graid3.
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