Hi Greg,
I'm resending with cc, my email client dropped it automatically..
(We would recommend subscribing to the mailing list so that you can receive
replies certainly.)
Thanks,
Kazu
-----Original Message-----
> Hi Greg,
>
> -----Original Message-----
> > The wait queue structs and members were renamed in 4.13. Add support to
> > the 'waitq' command for these more recent kernels.
>
> Thanks for the patch, good catch.
>
> (Ah, my test has missed the command..)
>
> It would be helpful if you add the kernel commits to the commit log,
> I think they are ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f and
> 9d9d676f595b5081326be7a17dc681fcb38fb3b2.
>
> >
> > Signed-off-by: Greg Edwards <gedwards@xxxxxxx>
> > ---
> > defs.h | 4 ++++
> > kernel.c | 23 +++++++++++++++++++++--
> > symbols.c | 8 +++++++-
> > 3 files changed, 32 insertions(+), 3 deletions(-)
> >
> > diff --git a/defs.h b/defs.h
> > index 42c8074e6ac6..170e9cba724f 100644
> > --- a/defs.h
> > +++ b/defs.h
> > @@ -1589,6 +1589,9 @@ struct offset_table { /* stash of commonly-used offsets */
> > long __wait_queue_task;
> > long __wait_queue_head_task_list;
> > long __wait_queue_task_list;
> > + long wait_queue_entry_private;
> > + long wait_queue_head_head;
> > + long wait_queue_entry_entry;
> > long pglist_data_node_zones;
> > long pglist_data_node_mem_map;
> > long pglist_data_node_start_paddr;
> > @@ -2188,6 +2191,7 @@ struct size_table { /* stash of commonly-used sizes */
> > long tvec_t_base_s;
> > long wait_queue;
> > long __wait_queue;
> > + long wait_queue_entry;
>
> Would you move these offsets and size to the end of its table?
> to avoid breaking previously compiled extension modules.
>
> (ref. crash's contribution guidelines: https://github.com/crash-utility/crash/wiki)
>
>
> > long device;
> > long net_device;
> > long sock;
> > diff --git a/kernel.c b/kernel.c
> > index 528f6ee524f6..1d50a7200e42 100644
> > --- a/kernel.c
> > +++ b/kernel.c
> > @@ -614,8 +614,16 @@ kernel_init()
> > } else if (symbol_exists("tvec_bases"))
> > kt->flags |= TVEC_BASES_V1;
> >
> > - STRUCT_SIZE_INIT(__wait_queue, "__wait_queue");
> > - if (VALID_STRUCT(__wait_queue)) {
> > + STRUCT_SIZE_INIT(wait_queue_entry, "wait_queue_entry");
> > + if (VALID_STRUCT(wait_queue_entry)) {
> > + MEMBER_OFFSET_INIT(wait_queue_entry_private,
> > + "wait_queue_entry", "private");
> > + MEMBER_OFFSET_INIT(wait_queue_head_head,
> > + "wait_queue_head", "head");
> > + MEMBER_OFFSET_INIT(wait_queue_entry_entry,
> > + "wait_queue_entry", "entry");
> > + } else if (VALID_STRUCT(__wait_queue)) {
> > + STRUCT_SIZE_INIT(__wait_queue, "__wait_queue");
>
> The VALID_STRUCT(__wait_queue) macro can be used after calling
> STRUCT_SIZE_INIT(__wait_queue, "__wait_queue"), so please move this
> prior to the if block.
>
> > if (MEMBER_EXISTS("__wait_queue", "task"))
> > MEMBER_OFFSET_INIT(__wait_queue_task,
> > "__wait_queue", "task");
> > @@ -9397,6 +9405,17 @@ dump_waitq(ulong wq, char *wq_name)
> > ld->list_head_offset = OFFSET(__wait_queue_task_list);
> > ld->member_offset = next_offset;
> >
> > + start_index = 1;
> > + } else if (VALID_STRUCT(wait_queue_entry)) {
> > + ulong task_list_offset;
> > +
> > + next_offset = OFFSET(list_head_next);
> > + task_offset = OFFSET(wait_queue_entry_private);
> > + task_list_offset = OFFSET(wait_queue_head_head);
> > + ld->end = ld->start = wq + task_list_offset + next_offset;
> > + ld->list_head_offset = OFFSET(wait_queue_entry_entry);
> > + ld->member_offset = next_offset;
> > +
> > start_index = 1;
> > } else {
> > return;
>
> Personally I would like to add a message to inform the structure change
> so that my test can detect it. So could you replace the return with this?
>
> error(FATAL, "cannot determine wait queue structure\n");
>
>
> > diff --git a/symbols.c b/symbols.c
> > index 370d4c3e8ac0..72eea43871bb 100644
> > --- a/symbols.c
> > +++ b/symbols.c
> > @@ -9817,7 +9817,13 @@ dump_offset_table(char *spec, ulong makestruct)
> > OFFSET(__wait_queue_head_task_list));
> > fprintf(fp, " __wait_queue_task_list: %ld\n",
> > OFFSET(__wait_queue_task_list));
> > -
> > + fprintf(fp, " wait_queue_entry_private: %ld\n",
> > + OFFSET(wait_queue_entry_private));
> > + fprintf(fp, " wait_queue_head_head: %ld\n",
> > + OFFSET(wait_queue_head_head));
> > + fprintf(fp, " wait_queue_entry_entry: %ld\n",
> > + OFFSET(wait_queue_entry_entry));
> > +
>
> Please print also SIZE(wait_queue_entry).
>
> Thanks,
> Kazu
>
> > fprintf(fp, " pglist_data_node_zones: %ld\n",
> > OFFSET(pglist_data_node_zones));
> > fprintf(fp, " pglist_data_node_mem_map: %ld\n",
> > --
> > 2.32.0
> >
> >
> > --
> > Crash-utility mailing list
> > Crash-utility@xxxxxxxxxx
> > https://listman.redhat.com/mailman/listinfo/crash-utility
>
>
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