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authorEric W. Biederman <ebiederm@xmission.com>2017-09-26 20:06:43 +0200
committerEric W. Biederman <ebiederm@xmission.com>2018-07-21 17:43:12 +0200
commit2c4704756cab7cfa031ada4dab361562f0e357c0 (patch)
tree8757eb8762d60e34eeab747493759abf3f902c09 /kernel/time
parentkvm: Don't open code task_pid in kvm_vcpu_ioctl (diff)
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pids: Move the pgrp and session pid pointers from task_struct to signal_struct
To access these fields the code always has to go to group leader so going to signal struct is no loss and is actually a fundamental simplification. This saves a little bit of memory by only allocating the pid pointer array once instead of once for every thread, and even better this removes a few potential races caused by the fact that group_leader can be changed by de_thread, while signal_struct can not. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/time')
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