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Add a dlist to track all active lockwait child processes.
Everytime creating a new lockwait handle, check if there is already an
active lockwait process for this database/key and if so,
send the new request straight to the overflow queue.
This means we will only have one active lockwaic child process for a certain key,
even if there were thousands of fetch-lock requests for this key.
When the lockwait processing finishes for the original request, the processing in d_overflow() will automagically process all remaining keys as well.
Add back a --nosetsched argument to make it easier to run under gdb
(This used to be ctdb commit 3e9317a2e1f687b04bf51575d47fcd4faa6e6515)
Once we have more than 200 children waiting on a particular db, don't create
any more. Just put them on an overflow queue, and when a child gets a lock
search that queue to see if others were after the same lock (they probably
were).
(This used to be ctdb commit 5e614e8cfd1e9a4b13035a0e400b7a60a745b510)
scheduler for the child.
Use ctdb_fork() from callers where we dont want the child to be running
at real-time privilege.
(This used to be ctdb commit 58795a4c9e0624e20fa3e0023b65127053edd103)
This means we can distinguish which child is logging, esp. via syslog where we have no pid.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 68b3761a0874429b90731741f0531f76dcfbb081)
In Samba this is now called "tevent", and while we use the backwards
compatibility wrappers they don't offer EVENT_FD_AUTOCLOSE: that is now
a separate tevent_fd_set_auto_close() function.
This is based on Samba version 7f29f817fa.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 85e5e760cc91eb3157d3a88996ce474491646726)
so we can spot if there are leaks.
plug two leaks for filedescriptors related to when sending ARP fail
and one leak when we can not parse the local address during tcp connection establish
(This used to be ctdb commit ddd089810a14efe4be6e1ff3eccaa604e4913c9e)
log the type of operation and the database name for all latencies higher
than a treshold
(This used to be ctdb commit 1d581dcd507e8e13d7ae085ff4d6a9f3e2aaeba5)
This reverts commit bfba5c7249eff8a10a43b53c1b89dd44b625fd10.
revert the waitpid changes. we need to waitpid for some childredn so should
refactor the approach completely
(This used to be ctdb commit 702ced6c2fe569c01fe96c60d0f35a7e61506a96)
so we should not call it from the main daemon.
1, set SIGCHLD to SIG_DFL to make sure we ignore this signal
2, get rid of all waitpid() calls
3, change reporting of event script status code from _exit()/waitpid() to write()/read() one byte across the pipe.
(This used to be ctdb commit bfba5c7249eff8a10a43b53c1b89dd44b625fd10)
