----- Original Message -----
> Sorry, I made some mistake.
>
> At 2012-4-11 17:06, qiaonuohan wrote:
> >
> > what is struct nsproxy? Or is there any symbol referring to ipc_ns?
>
> I want to know how does the kernel get struct ipc_ids. the previous and
> the hind kernel uses current->nsproxy->ipc_ns to get the pointer to
> struct ipc_namespace and then use a macro shm_ids to get struct ipc_ids.
> What about this kernel?
It does the same thing. But in the failure case, it appears that the
task_struct.nsproxy pointer that you are using is NULL:
> >
> > (c) On this 2.6.36-0.16.rc3.git0.fc15 Fedora kernel, it shows:
> >
> > ------ Shared Memory Segments ------
> > KEY SHMID UID PERMS BYTES NATTCH
> > STATUS
> > ipcs: invalid kernel virtual address: 10 type: "nsproxy.ipc_ns"
>
> >> (d) On *all* RHEL4 2.6.9-era and SLES9 2.6.5-era kernels, the
> >> command
> >> fail like this:
> >>
> >> ------ Shared Memory Segments ------
> >> KEY SHMID UID PERMS BYTES NATTCH STATUS
> >> ipcs: invalid structure member offset: ipc_id_ary_p
> >> FILE: ipcs.c LINE: 540 FUNCTION: ipc_search_array()
> >>
> >> or this:
> >>
> >> ------ Shared Memory Segments ------
> >> KEY SHMID UID PERMS BYTES NATTCH STATUS
> >> (none allocated)------ Semaphore Arrays --------
> >> KEY SEMID UID PERMS NSEMS
> >> ipcs: invalid structure member offset: ipc_id_ary_p
> >> FILE: ipcs.c LINE: 540 FUNCTION: ipc_search_array()
> >>
> >
> > what is struct ipc_id? And what is entries in struct ipc_id or something
> > similar to it?
>
> I mean struct ipc_ids, not ipc_id.
RHEL4/linux-2.6.9:
crash> ipc_ids
struct ipc_ids {
int size;
int in_use;
int max_id;
short unsigned int seq;
short unsigned int seq_max;
struct semaphore sem;
struct ipc_id *entries;
}
SIZE: 56
crash>
Dave
--
Crash-utility mailing list
Crash-utility@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/crash-utility
