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Wed, 19 Mar 2025 18:02:23 +0000 (GMT) Message-ID: <6a88fd00-3997-4930-a6dc-11ece42a6c72@linux.ibm.com> Date: Wed, 19 Mar 2025 19:02:23 +0100 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 09/20] s390/zcrypt: Introduce pre-allocated device status array for ep11 misc To: Harald Freudenberger , ifranzki@linux.ibm.com, fcallies@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com Cc: linux-s390@vger.kernel.org, herbert@gondor.apana.org.au References: <20250304172116.85374-1-freude@linux.ibm.com> <20250304172116.85374-10-freude@linux.ibm.com> Content-Language: de-DE From: Holger Dengler In-Reply-To: <20250304172116.85374-10-freude@linux.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: MpFFo1LCqj3My9Z_ZD2jaul-un0_20jK X-Proofpoint-ORIG-GUID: MpFFo1LCqj3My9Z_ZD2jaul-un0_20jK X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-19_06,2025-03-19_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 priorityscore=1501 malwarescore=0 bulkscore=0 adultscore=0 clxscore=1015 spamscore=0 lowpriorityscore=0 mlxscore=0 suspectscore=0 phishscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2503190121 On 04/03/2025 18:21, Harald Freudenberger wrote: > Introduce a pre-allocated device status array memory together with > a mutex controlling the occupation to be used by the findcard() > function. Limit the device status array to max 128 cards and max > 128 domains to reduce the size of this pre-allocated memory to 64 KB. I have the same concerns as for patch 8/20. Please think about an alternative to the dev_status_mem sharing, because it synchronizes all findcard() calls. > > Signed-off-by: Harald Freudenberger > --- > drivers/s390/crypto/zcrypt_ep11misc.c | 46 +++++++++++++++++++++------ > 1 file changed, 36 insertions(+), 10 deletions(-) -- Mit freundlichen Grüßen / Kind regards Holger Dengler -- IBM Systems, Linux on IBM Z Development dengler@linux.ibm.com