668d2a0da5
By setting __GFP_NORETRY the kernel memory reclaim logic was allowed to abort early and dump a falled allocation stack to the console. Since this was done in a tight loop to fill memory it could result in a large number of stacks being dumped to the console. This in turn slowed down the test sufficiently so it exceeded the time limit and failed. To resolve this issue the __GFP_NORETRY flag is being removed. This is how it should have been called originally to ensure we're simulating the behavior of most callers which will use the GFP_KERNEL flag. In addition, the reclaim granularity of 1000 objects was far to coarse for this to be a realistic test. For kmem:slab_reclaim there might only be a few thousand objects total in the cache. Therefore, the SPLAT_KMEM_OBJ_RECLAIM constant for these tests was lowered. This will cause the reclaim callback to run more frequently which makes for a better test case. The frequency of the cache reaping in kmem:slab_reap was increased to accommodate the reduced number of objects released during the reclaim. These changes only impact the test cases and were done to remove false positives caused by the test case itself. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> |
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README.markdown
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 do not want the overhead of maintaining a large patch which converts Solaris primitives to Linux primitives.
To build packages for your distribution:
$ ./configure
$ make pkg
If you are building directly from the git tree and not an officially released tarball you will need to generate the configure script. This can be done by executing the autogen.sh script after installing the GNU autotools for your distribution.
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-...
The SPL comes with an automated test suite called SPLAT. The test suite is implemented in two parts. There is a kernel module which contains the tests and a user space utility which controls which tests are run. To run the full test suite:
$ sudo insmod ./module/splat/splat.ko
$ sudo ./cmd/splat --all
Full documentation for building, configuring, testing, and using the SPL can be found at: http://zfsonlinux.org