* [PATCH] selftests/livepatch: Do not check order when using "comm" for dmesg checking
@ 2020-08-27 11:07 Miroslav Benes
2020-08-27 13:20 ` Joe Lawrence
0 siblings, 1 reply; 6+ messages in thread
From: Miroslav Benes @ 2020-08-27 11:07 UTC (permalink / raw)
To: jpoimboe, jikos, pmladek, joe.lawrence, shuah
Cc: live-patching, linux-kselftest, linux-kernel, Miroslav Benes
check_result() uses "comm" to check expected results of selftests output
in dmesg. Everything works fine if timestamps in dmesg are unique. If
not, like in this example
[ 86.844422] test_klp_callbacks_demo: pre_unpatch_callback: test_klp_callbacks_mod -> [MODULE_STATE_LIVE] Normal state
[ 86.844422] livepatch: 'test_klp_callbacks_demo': starting unpatching transition
, "comm" fails with "comm: file 2 is not in sorted order". Suppress the
order checking with --nocheck-order option.
Signed-off-by: Miroslav Benes <mbenes@suse.cz>
---
The strange thing is, I can reproduce the issue easily and reliably on
older codestreams (4.12) but not on current upstream in my testing
environment. I think the change makes sense regardless though.
tools/testing/selftests/livepatch/functions.sh | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/livepatch/functions.sh b/tools/testing/selftests/livepatch/functions.sh
index 1aba83c87ad3..846c7ed71556 100644
--- a/tools/testing/selftests/livepatch/functions.sh
+++ b/tools/testing/selftests/livepatch/functions.sh
@@ -278,7 +278,7 @@ function check_result {
# help differentiate repeated testing runs. Remove them with a
# post-comparison sed filter.
- result=$(dmesg | comm -13 "$SAVED_DMESG" - | \
+ result=$(dmesg | comm --nocheck-order -13 "$SAVED_DMESG" - | \
grep -e 'livepatch:' -e 'test_klp' | \
grep -v '\(tainting\|taints\) kernel' | \
sed 's/^\[[ 0-9.]*\] //')
--
2.28.0
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH] selftests/livepatch: Do not check order when using "comm" for dmesg checking
2020-08-27 11:07 [PATCH] selftests/livepatch: Do not check order when using "comm" for dmesg checking Miroslav Benes
@ 2020-08-27 13:20 ` Joe Lawrence
2020-08-27 13:28 ` Jiri Kosina
0 siblings, 1 reply; 6+ messages in thread
From: Joe Lawrence @ 2020-08-27 13:20 UTC (permalink / raw)
To: Miroslav Benes
Cc: jpoimboe, jikos, pmladek, shuah, live-patching, linux-kselftest,
linux-kernel
On Thu, Aug 27, 2020 at 01:07:09PM +0200, Miroslav Benes wrote:
> check_result() uses "comm" to check expected results of selftests output
> in dmesg. Everything works fine if timestamps in dmesg are unique. If
> not, like in this example
>
> [ 86.844422] test_klp_callbacks_demo: pre_unpatch_callback: test_klp_callbacks_mod -> [MODULE_STATE_LIVE] Normal state
> [ 86.844422] livepatch: 'test_klp_callbacks_demo': starting unpatching transition
>
Heh, our assumption that the timestamps would provide sorting wasn't
true after all.
> , "comm" fails with "comm: file 2 is not in sorted order". Suppress the
> order checking with --nocheck-order option.
>
> Signed-off-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
And not so important for selftests, but helpful for backporting efforts:
Fixes: 2f3f651f3756 ("selftests/livepatch: Use "comm" instead of "diff" for dmesg")
> ---
>
> The strange thing is, I can reproduce the issue easily and reliably on
> older codestreams (4.12) but not on current upstream in my testing
> environment. I think the change makes sense regardless though.
>
We haven't backported v5.8 changes just yet, so thanks for finding this
one and posting a fix.
-- Joe
> tools/testing/selftests/livepatch/functions.sh | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/livepatch/functions.sh b/tools/testing/selftests/livepatch/functions.sh
> index 1aba83c87ad3..846c7ed71556 100644
> --- a/tools/testing/selftests/livepatch/functions.sh
> +++ b/tools/testing/selftests/livepatch/functions.sh
> @@ -278,7 +278,7 @@ function check_result {
> # help differentiate repeated testing runs. Remove them with a
> # post-comparison sed filter.
>
> - result=$(dmesg | comm -13 "$SAVED_DMESG" - | \
> + result=$(dmesg | comm --nocheck-order -13 "$SAVED_DMESG" - | \
> grep -e 'livepatch:' -e 'test_klp' | \
> grep -v '\(tainting\|taints\) kernel' | \
> sed 's/^\[[ 0-9.]*\] //')
> --
> 2.28.0
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] selftests/livepatch: Do not check order when using "comm" for dmesg checking
2020-08-27 13:20 ` Joe Lawrence
@ 2020-08-27 13:28 ` Jiri Kosina
2020-10-14 21:48 ` Joe Lawrence
0 siblings, 1 reply; 6+ messages in thread
From: Jiri Kosina @ 2020-08-27 13:28 UTC (permalink / raw)
To: Joe Lawrence
Cc: Miroslav Benes, jpoimboe, pmladek, shuah, live-patching,
linux-kselftest, linux-kernel
On Thu, 27 Aug 2020, Joe Lawrence wrote:
> > , "comm" fails with "comm: file 2 is not in sorted order". Suppress the
> > order checking with --nocheck-order option.
> >
> > Signed-off-by: Miroslav Benes <mbenes@suse.cz>
>
> Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
>
> And not so important for selftests, but helpful for backporting efforts:
>
> Fixes: 2f3f651f3756 ("selftests/livepatch: Use "comm" instead of "diff" for dmesg")
I've added the Fixes: tag and applied to for-5.9/upstream-fixes. Thanks,
--
Jiri Kosina
SUSE Labs
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] selftests/livepatch: Do not check order when using "comm" for dmesg checking
2020-08-27 13:28 ` Jiri Kosina
@ 2020-10-14 21:48 ` Joe Lawrence
2020-10-14 21:53 ` Jiri Kosina
0 siblings, 1 reply; 6+ messages in thread
From: Joe Lawrence @ 2020-10-14 21:48 UTC (permalink / raw)
To: Jiri Kosina; +Cc: Miroslav Benes, jpoimboe, pmladek, shuah, live-patching
On 8/27/20 9:28 AM, Jiri Kosina wrote:
> On Thu, 27 Aug 2020, Joe Lawrence wrote:
>
>>> , "comm" fails with "comm: file 2 is not in sorted order". Suppress the
>>> order checking with --nocheck-order option.
>>>
>>> Signed-off-by: Miroslav Benes <mbenes@suse.cz>
>>
>> Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
>>
>> And not so important for selftests, but helpful for backporting efforts:
>>
>> Fixes: 2f3f651f3756 ("selftests/livepatch: Use "comm" instead of "diff" for dmesg")
>
> I've added the Fixes: tag and applied to for-5.9/upstream-fixes. Thanks,
>
Hi Jiri,
I was looking at a list of livepatching commits that went into 5.9 for
backporting and was wondering if we ever merged this one?
It's not a show-stopper, but would be nice to get this one in for 5.10
if possible.
Thanks,
-- Joe
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] selftests/livepatch: Do not check order when using "comm" for dmesg checking
2020-10-14 21:48 ` Joe Lawrence
@ 2020-10-14 21:53 ` Jiri Kosina
2020-10-14 22:15 ` Joe Lawrence
0 siblings, 1 reply; 6+ messages in thread
From: Jiri Kosina @ 2020-10-14 21:53 UTC (permalink / raw)
To: Joe Lawrence; +Cc: Miroslav Benes, jpoimboe, pmladek, shuah, live-patching
On Wed, 14 Oct 2020, Joe Lawrence wrote:
> >> Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
> >>
> >> And not so important for selftests, but helpful for backporting efforts:
> >>
> >> Fixes: 2f3f651f3756 ("selftests/livepatch: Use "comm" instead of "diff" for
> >> dmesg")
> >
> > I've added the Fixes: tag and applied to for-5.9/upstream-fixes. Thanks,
> >
>
> Hi Jiri,
>
> I was looking at a list of livepatching commits that went into 5.9 for
> backporting and was wondering if we ever merged this one?
>
> It's not a show-stopper, but would be nice to get this one in for 5.10 if
> possible.
Hi Joe,
it was not enough of a trigger to actually send 5.9-rc pull request. But
in cases like this, for-5.x/upstream-fixes branch gets included in 5.x+1
pull request. So it absolutely will land in 5.10.
Thanks,
--
Jiri Kosina
SUSE Labs
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] selftests/livepatch: Do not check order when using "comm" for dmesg checking
2020-10-14 21:53 ` Jiri Kosina
@ 2020-10-14 22:15 ` Joe Lawrence
0 siblings, 0 replies; 6+ messages in thread
From: Joe Lawrence @ 2020-10-14 22:15 UTC (permalink / raw)
To: Jiri Kosina; +Cc: Miroslav Benes, jpoimboe, pmladek, shuah, live-patching
On 10/14/20 5:53 PM, Jiri Kosina wrote:
> On Wed, 14 Oct 2020, Joe Lawrence wrote:
>
>>>> Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
>>>>
>>>> And not so important for selftests, but helpful for backporting efforts:
>>>>
>>>> Fixes: 2f3f651f3756 ("selftests/livepatch: Use "comm" instead of "diff" for
>>>> dmesg")
>>>
>>> I've added the Fixes: tag and applied to for-5.9/upstream-fixes. Thanks,
>>>
>>
>> Hi Jiri,
>>
>> I was looking at a list of livepatching commits that went into 5.9 for
>> backporting and was wondering if we ever merged this one?
>>
>> It's not a show-stopper, but would be nice to get this one in for 5.10 if
>> possible.
>
> Hi Joe,
>
> it was not enough of a trigger to actually send 5.9-rc pull request. But
> in cases like this, for-5.x/upstream-fixes branch gets included in 5.x+1
> pull request. So it absolutely will land in 5.10.
>
Ah ok, I agree holding onto that one that makes sense. The branch name
threw me off, so I thought I'd ping.
Thanks,
-- Joe
^ permalink raw reply [flat|nested] 6+ messages in thread
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2020-08-27 11:07 [PATCH] selftests/livepatch: Do not check order when using "comm" for dmesg checking Miroslav Benes
2020-08-27 13:20 ` Joe Lawrence
2020-08-27 13:28 ` Jiri Kosina
2020-10-14 21:48 ` Joe Lawrence
2020-10-14 21:53 ` Jiri Kosina
2020-10-14 22:15 ` Joe Lawrence
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