This is a portability change which removes the dependence of the Solaris
thread library. All locations where Solaris thread API was used before
have been replaced with equivilant Solaris kernel style thread calls.
In user space the kernel style threading API is implemented in term of
the portable pthreads library. This includes all threads, mutexs,
condition variables, reader/writer locks, and taskqs.
Updated fix to detect if we are in an interrupt and only sleep if it
is safe to do some. I guess it must be safe to sleep under Solaris
this must be handled in a sort interrupt handler there
Additional minor memory related tweak to move certain large allocations
to virtual memory and in one case to simply suppress the warning message
since it is not that far over the warning limit.
Upstream they modified the ioctl code so we need to make similiar
updates since we modify the API ourselves to always pass a pointer
to file pointer around. This allows us to track per file handle
state which is used by the zevent code.
The ZVOL interfaces changed significantly with the latest update. I've
updated the Linux version of the code to handle this and it looks like
the net result has been a simpler implementation which is good! Plus,
I'm relatively sure the ZIL integration is right this time although it
needs some serious crash testing to verify that.
Also minor additions to vdev_disk for .hold and .rele callbacks.
Currently, they do nothing and I may be able to simply stub them out
with NULLs for Linux since opening the device in Linux should have
much the same effort. More investigation is needed though since
the ZFS interface may make some demands here I'm overlooking.
The major change is removing the thread pool when importing devices.
This may be reintroduced at some point if needed, but it is added
complexity which has already been handled by blkid on modern Linux
systems. We only need to fallback to probing everything is /dev/
if you config file is toast and even then it only takes a few seconds.
After such a large update many of the symbols which were previously
exported are no longer available, and several new symbols have been
added and are needed. Refresh to topic branch to reflect this.
Brian Behlendorf