ba282d085e
This reverts i915_active.c 1.11. ref->retire might free the object, so touching it is not allowed -- that would use-after-free. Linux uses the object only for its address with wake_up_var. The reason I made this change was that I guessed i915_active_wait has to wait until after ref->retire finishes -- after all, Linux seems to defer the wakeup until then. However, even the Linux code doesn't guarantee this, because i915_active_wait could be called _during_ ref->retire, and would witness ref->count == 0, and would not wait until it has completed in that case. So maybe my guess was wrong, and it is OK for i915_active_wait to return while ref->retire is still in flight -- I don't see any logic that obviously requires it to wait for ref->retire, in any case. Or maybe something does rely on i915_active_wait to wait for ref->retire to finish, in which case we need a different mechanism for i915_active_release itself to wait until i915_active_retire has woken up, without dereferencing ref since it might be dead after ref->retire. |
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| common | ||
| compat | ||
| crypto | ||
| dist/pf | ||
| distrib | ||
| doc | ||
| etc | ||
| external | ||
| extsrc | ||
| games | ||
| include | ||
| lib | ||
| libexec | ||
| regress | ||
| rescue | ||
| sbin | ||
| share | ||
| sys | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| BUILDING | ||
| Makefile | ||
| Makefile.inc | ||
| README.md | ||
| UPDATING | ||
| build.sh | ||
README.md
NetBSD
NetBSD is a free, fast, secure, and highly portable Unix-like Open Source operating system. It is available for a wide range of platforms, from large-scale servers and powerful desktop systems to handheld and embedded devices.
Building
You can cross-build NetBSD from most UNIX-like operating systems. To build for amd64 (x86_64), in the src directory:
./build.sh -U -u -j4 -m amd64 -O ~/obj release
Additional build information available in the BUILDING file.
Binaries
Testing
On a running NetBSD system:
cd /usr/tests; atf-run | atf-report
Troubleshooting
- Send bugs and patches via web form.
- Subscribe to the mailing lists. The netbsd-users list is a good choice for many problems; watch current-users if you follow the bleeding edge of NetBSD-current.
- Join the community IRC channel #netbsd @ libera.chat.
Latest sources
To fetch the main CVS repository:
cvs -d anoncvs@anoncvs.NetBSD.org:/cvsroot checkout -P src
To work in the Git mirror, which is updated every few hours from CVS:
git clone https://github.com/NetBSD/src.git