Hi Kazu, On Tue, Sep 6, 2022 at 1:32 PM HAGIO KAZUHITO(萩尾 一仁) <k-hagio-ab@xxxxxxx> wrote: > > > On 2022/09/05 16:09, Tao Liu wrote: > > 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. > > If we do this, it would be better to support a kernel without > CONFIG_VMAP_STACK, too. Any reason not to support? > I will support it in the v4 patch. Sorry for the late reply, I was busy working on the maple tree support for crash, which is in a final stage and code refactoring/testing. Maybe it will take a few days before I work on the v4. Thanks, Tao Liu > crash> sys > KERNEL: vmlinux-3.10.0-957.el7.x86_64 > ... > crash> kmem ffff88007cfdbf80 > PID: 1 > COMMAND: "systemd" > TASK: ffff88007cfd0000 [THREAD_INFO: ffff88007cfd8000] > CPU: 0 > STATE: TASK_INTERRUPTIBLE > > PAGE PHYSICAL MAPPING INDEX CNT FLAGS > ffffea0001f3f6c0 7cfdb000 0 0 0 1fffff00000000 > > crash> kmem 7cfdbf80 > PAGE PHYSICAL MAPPING INDEX CNT FLAGS > ffffea0001f3f6c0 7cfdb000 0 0 0 1fffff00000000 > > > Thanks, > Kazu > > > > > 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 > > > > Signed-off-by: Tao Liu <ltao@xxxxxxxxxx> > > --- > > 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()); -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/crash-utility Contribution Guidelines: https://github.com/crash-utility/crash/wiki
