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Rao" Subject: Re: [PATCH] selftests/ftrace: Disable multiple_kprobes test on powerpc To: Masami Hiramatsu Cc: linux-kernel@vger.kernel.org, Steven Rostedt , shuah@kernel.org References: <20210105065730.2634785-1-naveen.n.rao@linux.vnet.ibm.com> <20210105190156.ada6ce0d46d7eada18b9ad76@kernel.org> In-Reply-To: <20210105190156.ada6ce0d46d7eada18b9ad76@kernel.org> MIME-Version: 1.0 User-Agent: astroid/v0.15-13-gb675b421 (https://github.com/astroidmail/astroid) Message-Id: <1609841373.5sgt2b2ism.naveen@linux.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2021-01-05_01:2021-01-05,2021-01-05 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxscore=0 spamscore=0 bulkscore=0 mlxlogscore=873 suspectscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 phishscore=0 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101050058 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Masami Hiramatsu wrote: > On Tue, 5 Jan 2021 12:27:30 +0530 > "Naveen N. Rao" wrote: >=20 >> Not all symbols are blacklisted on powerpc. Disable multiple_kprobes >> test until that is sorted, so that rest of ftrace and kprobe selftests >> can be run. >=20 > This looks good to me, but could you try to find the functions > which should be blocked from kprobes? > (Usually, the function which are involved in the sw-breakpoint > handling, including locks etc.) Yes, we did add several blacklists some time back, but there has been=20 quite a bit of churn in our entry code. I've been meaning to audit it=20 for a while now, but this has been blocking tests. It would be nice to=20 skip this test for now until I am able to spend some time on this. Thanks, Naveen