efcd0ca32d
After the emergency slab objects were merged I started observing timeout failures in the kmem:slab_overcommit test. These were due to the ineffecient way the slab_overcommit reclaim function was implemented. And due to the additional cost of potentially allocating ten of thousands of emergency objects and tracking them on a single list. This patch addresses the first concern by enhansing the test case to trace all of the allocations objects as a linked list. This allows for a cleaner version of the reclaim function to simply release SPLAT_KMEM_OBJ_RECLAIM objects. Since this touches some common code all the tests which share these data structions were also updated. After making these changes slab_overcommit is reliably passing. However, there is certainly additional cleanup which could be done here. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
The Solaris Porting Layer (SPL) is a Linux kernel module which provides many of the Solaris kernel APIs. This shim layer makes it possible to run Solaris kernel code in the Linux kernel with relatively minimal modification. This can be particularly useful when you want to track upstream Solaris development closely and don’t want the overhead of maintaining a large patch which converts Solaris primitives to Linux primitives.
To build packages for your distribution:
$ ./configure
$ make pkg
To copy the kernel code inside your kernel source tree for builtin compilation:
$ ./configure --enable-linux-builtin --with-linux=/usr/src/linux-...
$ ./copy-builtin /usr/src/linux-...
Full documentation for building, configuring, and using the SPL can be found at: http://zfsonlinux.org