summaryrefslogtreecommitdiffstats
path: root/docs/rcu.txt
Commit message (Collapse)AuthorAgeFilesLines
* doc/rcu: fix g_free_rcu() usage exampleSergey Fedorov2015-10-191-1/+1
| | | | | | | | | | | The first argument of g_free_rcu() is a pointer to a structure. But foo_reclaim is used as a function name in the previous example along with &foo as a pointer to the structure being reclaimed. Make the example consistent with the previous one. Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-Id: <1444837604-13712-1-git-send-email-serge.fdrv@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* rcu: add g_free_rcuPaolo Bonzini2015-02-161-4/+7
| | | | | | This simplifies calling g_free from an RCU callback. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* rcu: add call_rcuPaolo Bonzini2015-02-021-4/+106
| | | | | | | | | | | | Asynchronous callbacks provided by call_rcu are particularly important for QEMU, because the BQL makes it hard to use synchronize_rcu. In addition, the current RCU implementation is not particularly friendly to multiple concurrent synchronize_rcu callers, making call_rcu even more important. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* rcu: add rcu libraryPaolo Bonzini2015-02-021-0/+285
This includes a (mangled) copy of the liburcu code. The main changes are: 1) removing dependencies on many other header files in liburcu; 2) removing for simplicity the tentative busy waiting in synchronize_rcu, which has limited performance effects; 3) replacing futexes in synchronize_rcu with QemuEvents for Win32 portability. The API is the same as liburcu, so it should be possible in the future to require liburcu on POSIX systems for example and use our copy only on Windows. Among the various versions available I chose urcu-mb, which is the least invasive implementation even though it does not have the fastest rcu_read_{lock,unlock} implementation. The urcu flavor can be changed later, after benchmarking. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
OpenPOWER on IntegriCloud