diff options
| author | Surbhi Palande <surbhi.palande@canonical.com> | 2009-12-08 11:44:34 +0200 |
|---|---|---|
| committer | John Rigby <john.rigby@linaro.org> | 2012-06-25 15:02:07 -0600 |
| commit | f560aad1f0f57fdb0da87cc5023ca9ae3e3dc656 (patch) | |
| tree | 7ebb6b51a0478aa8221c3ac11c6452a71617efa5 /init/main.c | |
| parent | 5700f7a09765fffabc796d1d6a187604fe6f9415 (diff) | |
UBUNTU: SAUCE: Make populate_rootfs asynchronous
The expansion of the initramfs is completely independant of other
boot activities. The original data is already present at boot and the
filesystem is not required until we are ready to start init. It is
therefore reasonable to populate the rootfs asynchronously. Move this
processing to an async call.
This reduces kernel initialisation time (the time from bootloader to
starting userspace) by several 10ths of a second on a selection of test
hardware particularly SMP systems, although UP system also benefit.
Signed-off-by: Surbhi Palande <surbhi.palande@canonical.com>
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Diffstat (limited to 'init/main.c')
| -rw-r--r-- | init/main.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c index 0af72b99d00..b0751f0bfe0 100644 --- a/init/main.c +++ b/init/main.c @@ -871,6 +871,12 @@ static int __init kernel_init(void * unused) (void) sys_dup(0); (void) sys_dup(0); /* + * We need to ensure that the filesystem is ready by this point, wait for + * async_populate_rootfs to complete. + */ + async_synchronize_full_domain(&populate_rootfs_domain); + + /* * check if there is an early userspace init. If yes, let it do all * the work */ |