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X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 35092c11-c7f8-43a8-cc33-08dda99b925c X-MS-Exchange-CrossTenant-AuthSource: DM6PR10MB4313.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Jun 2025 10:26:20.0179 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 65EesxiU9+fRh+olyYBYlbY22l/daKLcr+BlYdMW3gYDrIrf1Hz5Z/K9Q+oXwPJMFZOOVcOvave+i/Nw13j1Ag== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR10MB7684 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-06-12_07,2025-06-10_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 mlxlogscore=999 bulkscore=0 malwarescore=0 suspectscore=0 spamscore=0 phishscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2505160000 definitions=main-2506120080 X-Proofpoint-GUID: ZFfVQNVrNF_THe3aFr9PoZ6gP_wN4lSE X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjEyMDA4MCBTYWx0ZWRfXzB7xlRNn9/R7 4pq59ykw/xtSUHAyTIdZtt6OXErhZl5+5edfgPuQgZOkhryJ9DIugvhvYvnkXG7TrQPsFe8OdNP JcOZjMJuWkIv8mFnYa7oxPG8vFNXB80Pb53hhiuC8LEiDyn4Ie/ePvF1XV0cg0m5ZIyKYpymWsX Ilfl7fnud+ZrBlSuy91QmRnnQia8555i8Dj5PXzQkmTkbprnCsUxbhvg5QliqW9LSTBod9EycyK wYMm8DB3emxyR8oAS/wHGhPN9ZC9TAaZU99Zc0s5Wdd2mqfiXZ4NDxadhbDYxPc4LnqMwkJwduW +bSLZTQeB4aSoEgiVOKPv6jNUGvYdUiaIa9m9ms8QWRHYWLFuOTNuok/QL0F3mWvevj/JETngoz qUI0Hj4eodEQMzv0BlnDJxJV7lE2IQinmNR9gKd4MhgkWvXDgjigZ3N50elEbsfVH4bBirCu X-Proofpoint-ORIG-GUID: ZFfVQNVrNF_THe3aFr9PoZ6gP_wN4lSE X-Authority-Analysis: v=2.4 cv=d731yQjE c=1 sm=1 tr=0 ts=684aab4e b=1 cx=c_pps a=zPCbziy225d3KhSqZt3L1A==:117 a=zPCbziy225d3KhSqZt3L1A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=6IFa9wvqVegA:10 a=GoEa3M9JfhUA:10 a=pGLkceISAAAA:8 a=VnNF1IyMAAAA:8 a=TbEIRdRl60qcAvBagXwA:9 a=QEXdDO2ut3YA:10 cc=ntf awl=host:13206 On 11/06/2025 10:34, Ojaswin Mujoo wrote: > From: "Ritesh Harjani (IBM)" > > Brute force all possible blocksize clustersize combination on a bigalloc > filesystem for stressing atomic write using fio data crc verifier. We run > multiple threads in parallel with each job writing to its own file. The > parallel jobs running on a constrained filesystem size ensure that we stress > the ext4 allocator to allocate contiguous extents. > > Signed-off-by: Ritesh Harjani (IBM) > Signed-off-by: Ojaswin Mujoo RWF_ATOMIC does not guarantee that racing atomic writes and reads are serialised. That is what you are testing here, right? NVMe and SCSI do guarantee this (serialisation). However, reads in the block layer may be split into multiple requests, even though unlikely.