diff options
| author | Michael Niewöhner <[email protected]> | 2019-07-21 19:34:07 +0200 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2019-11-13 10:05:10 -0800 |
| commit | 66955885e24427a94e938c013da214bd5c0177d4 (patch) | |
| tree | 3f00fd60867f7a8de3848fe6d4074822de44717f /config | |
| parent | c025008df5398be4eb7f5b98e75822f447833dd4 (diff) | |
Make use of kvmalloc if available and fix vmem_alloc implementation
This patch implements use of kvmalloc for GFP_KERNEL allocations, which
may increase performance if the allocator is able to allocate physical
memory, if kvmalloc is available as a public kernel interface (since
v4.12). Otherwise it will simply fall back to virtual memory (vmalloc).
Also fix vmem_alloc implementation which can lead to slow allocations
since the first attempt with kmalloc does not make use of the noretry
flag but tells the linux kernel to retry several times before it fails.
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Matt Ahrens <[email protected]>
Signed-off-by: Sebastian Gottschall <[email protected]>
Signed-off-by: Michael Niewöhner <[email protected]>
Closes #9034
Diffstat (limited to 'config')
| -rw-r--r-- | config/kernel-kmem.m4 | 24 | ||||
| -rw-r--r-- | config/kernel.m4 | 2 |
2 files changed, 26 insertions, 0 deletions
diff --git a/config/kernel-kmem.m4 b/config/kernel-kmem.m4 index cc055e530..286229916 100644 --- a/config/kernel-kmem.m4 +++ b/config/kernel-kmem.m4 @@ -56,3 +56,27 @@ AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [ AC_MSG_CHECKING([whether detailed kmem tracking is enabled]) AC_MSG_RESULT([$enable_debug_kmem_tracking]) ]) + +dnl # +dnl # 4.12 API, +dnl # Added kvmalloc allocation strategy +dnl # +AC_DEFUN([ZFS_AC_KERNEL_SRC_KVMALLOC], [ + ZFS_LINUX_TEST_SRC([kvmalloc], [ + #include <linux/mm.h> + ],[ + void *p __attribute__ ((unused)); + + p = kvmalloc(0, GFP_KERNEL); + ]) +]) + +AC_DEFUN([ZFS_AC_KERNEL_KVMALLOC], [ + AC_MSG_CHECKING([whether kvmalloc(ptr, flags) is available]) + ZFS_LINUX_TEST_RESULT([kvmalloc], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_KVMALLOC, 1, [kvmalloc exists]) + ],[ + AC_MSG_RESULT(no) + ]) +]) diff --git a/config/kernel.m4 b/config/kernel.m4 index 1e39c15ca..4309d5456 100644 --- a/config/kernel.m4 +++ b/config/kernel.m4 @@ -44,6 +44,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [ ZFS_AC_KERNEL_SRC_SCHED ZFS_AC_KERNEL_SRC_USLEEP_RANGE ZFS_AC_KERNEL_SRC_KMEM_CACHE + ZFS_AC_KERNEL_SRC_KVMALLOC ZFS_AC_KERNEL_SRC_WAIT ZFS_AC_KERNEL_SRC_INODE_TIMES ZFS_AC_KERNEL_SRC_INODE_LOCK @@ -137,6 +138,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [ ZFS_AC_KERNEL_SCHED ZFS_AC_KERNEL_USLEEP_RANGE ZFS_AC_KERNEL_KMEM_CACHE + ZFS_AC_KERNEL_KVMALLOC ZFS_AC_KERNEL_WAIT ZFS_AC_KERNEL_INODE_TIMES ZFS_AC_KERNEL_INODE_LOCK |