On 2022/4/11 下午10:36, Dave Hansen wrote:
On 4/11/22 07:20, zhangfei....@foxmail.com wrote:
Is there nothing before this call trace? Usually there will be at least
some warning text.
I added dump_stack() in ioasid_free.
Hold on a sec, though...
What's the *problem* here? Did something break or are you just saying
that something looks weird to _you_?
After this, nginx is not working at all, and hardware reports error.
Suppose the the master use the ioasid for init, but got freed.
hardware reports:
[ 152.731869] hisi_sec2 0000:76:00.0: qm_acc_do_task_timeout [error
status=0x20] found
[ 152.739657] hisi_sec2 0000:76:00.0: qm_acc_wb_not_ready_timeout
[error status=0x40] found
[ 152.747877] hisi_sec2 0000:76:00.0: sec_fsm_hbeat_rint [error
status=0x20] found
[ 152.755340] hisi_sec2 0000:76:00.0: Controller resetting...
[ 152.762044] hisi_sec2 0000:76:00.0: QM mailbox operation timeout!
[ 152.768198] hisi_sec2 0000:76:00.0: Failed to dump sqc!
[ 152.773490] hisi_sec2 0000:76:00.0: Failed to drain out data for
stopping!
[ 152.781426] hisi_sec2 0000:76:00.0: QM mailbox is busy to start!
[ 152.787468] hisi_sec2 0000:76:00.0: Failed to dump sqc!
[ 152.792753] hisi_sec2 0000:76:00.0: Failed to drain out data for
stopping!
[ 152.800685] hisi_sec2 0000:76:00.0: QM mailbox is busy to start!
[ 152.806730] hisi_sec2 0000:76:00.0: Failed to dump sqc!
[ 152.812017] hisi_sec2 0000:76:00.0: Failed to drain out data for
stopping!
[ 152.819946] hisi_sec2 0000:76:00.0: QM mailbox is busy to start!
[ 152.825992] hisi_sec2 0000:76:00.0: Failed to dump sqc!
Thanks
For instance, if we have:
nginx: ioasid_alloc()==1
fork(); // spawn the daemon
exit();
ioasid_free(1);
and then a moment later:
lynx: ioasid_alloc()==1
fork();
exit();
ioasid_free(1);
There's no problem. The original nginx process with ioasid==1 exited.
The fact that *some* process called nginx is still running doesn't mean
that it still has a reference to asid==1.
Are you sure the nginx process that allocated the ASID is the same
process you see in ps?
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