Hi, Tao Thank you for the update. On Mon, Sep 5, 2022 at 8:00 PM <crash-utility-requ...@redhat.com> wrote:
> Date: Mon, 5 Sep 2022 15:09:22 +0800 > From: Tao Liu <l...@redhat.com> > To: crash-utility@redhat.com > Subject: [Crash-utility] [PATCH v3 3/3] Let kmem print task context > when physical address is vmalloced stack > Message-ID: <20220905070922.14426-4-l...@redhat.com> > Content-Type: text/plain; charset="US-ASCII"; x-default=true > > Patch [1] enables kmem to print task context if the given virtual > address is a vmalloced stack. > > This patch handles the same issue except the given address is > physical address. > Before: > crash> kmem 1883700e28 > VMAP_AREA VM_STRUCT ADDRESS RANGE > SIZE > ffff94eb9102c640 ffff94eb9102b140 ffffb7efce9b8000 - > ffffb7efce9bd000 20480 > > PAGE PHYSICAL MAPPING INDEX CNT FLAGS > ffffdd28220dc000 1883700000 0 0 1 50000000000000 > > After: > crash> kmem 1883700e28 > PID: 847 > COMMAND: "khungtaskd" > TASK: ffff94f8038f4000 [THREAD_INFO: ffff94f8038f4000] > CPU: 72 > STATE: TASK_RUNNING (PANIC) > > VMAP_AREA VM_STRUCT ADDRESS RANGE > SIZE > ffff94eb9102c640 ffff94eb9102b140 ffffb7efce9b8000 - > ffffb7efce9bd000 20480 > > PAGE PHYSICAL MAPPING INDEX CNT FLAGS > ffffdd28220dc000 1883700000 0 0 1 50000000000000 > > [1]: > https://listman.redhat.com/archives/crash-utility/2022-August/010074.html > > I did the test and got different results with yours as below. Did I miss anything else? crash> kmem ffff94e088110000 CACHE OBJSIZE ALLOCATED TOTAL SLABS SSIZE NAME ffff94e080c22a00 12040 3126 3129 3129 16k task_struct SLAB MEMORY NODE TOTAL ALLOCATED FREE ffffdd27c4204400 ffff94e088110000 0 1 1 0 FREE / [ALLOCATED] [ffff94e088110000] PID: 0 COMMAND: "swapper/2" TASK: ffff94e088110000 (1 of 96) [THREAD_INFO: ffff94e088110000] CPU: 2 STATE: TASK_RUNNING (ACTIVE) PAGE PHYSICAL MAPPING INDEX CNT FLAGS ffffdd27c4204400 108110000 ffff94e080c22a00 0 1 10000000008100 slab,head crash> kmem 108110000 CACHE OBJSIZE ALLOCATED TOTAL SLABS SSIZE NAME ffff94e080c22a00 12040 3126 3129 3129 16k task_struct SLAB MEMORY NODE TOTAL ALLOCATED FREE ffffdd27c4204400 ffff94e088110000 0 1 1 0 FREE / [ALLOCATED] [ffff94e088110000] PAGE PHYSICAL MAPPING INDEX CNT FLAGS ffffdd27c4204400 108110000 ffff94e080c22a00 0 1 10000000008100 slab,head crash> Thanks Lianbo Signed-off-by: Tao Liu <l...@redhat.com> > --- > memory.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/memory.c b/memory.c > index 1b6f9ba..eac8262 100644 > --- a/memory.c > +++ b/memory.c > @@ -13506,6 +13506,10 @@ kmem_search(struct meminfo *mi) > mi->flags &= ~GET_PHYS_TO_VMALLOC; > > if (mi->retval) { + if ((task = stkptr_to_task(mi->retval)) && (tc = > task_to_context(task))) { > + show_context(tc); > + fprintf(fp, "\n"); > + } > if ((sp = value_search(mi->retval, &offset))) { > show_symbol(sp, offset, > SHOW_LINENUM | SHOW_RADIX()); > -- > 2.33.1 >
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