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| author | Al Viro | 2014-08-07 13:51:03 +0200 |
|---|---|---|
| committer | Al Viro | 2014-08-07 20:40:08 +0200 |
| commit | b8f00e6be46f4c9a112e05fd692712873c4c4048 (patch) | |
| tree | f37aaef1d0fdfd9649f3ab14ee09de5f7100030d /kernel/cpu.c | |
| parent | acct: serialize acct_on() (diff) | |
| download | kernel-qcow2-linux-b8f00e6be46f4c9a112e05fd692712873c4c4048.tar.gz kernel-qcow2-linux-b8f00e6be46f4c9a112e05fd692712873c4c4048.tar.xz kernel-qcow2-linux-b8f00e6be46f4c9a112e05fd692712873c4c4048.zip | |
acct: new lifetime rules
Do not reuse bsd_acct_struct after closing the damn thing.
Structure lifetime is controlled by refcount now. We also
have a mutex in there, held over closing and writing (the
file is O_APPEND, so we are not losing any concurrency).
As the result, we do not need to bother with get_file()/fput()
on log write anymore. Moreover, do_acct_process() only needs
acct itself; file and pidns are picked from it.
Killed instances are distinguished by having NULL ->ns.
Refcount is protected by acct_lock; anybody taking the
mutex needs to grab a reference first.
The things will get a lot simpler in the next commits - this
is just the minimal chunk switching to the new lifetime rules.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/cpu.c')
0 files changed, 0 insertions, 0 deletions