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a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=GoEa3M9JfhUA:10 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=2Crv1cbGhsuC6-4c61sA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: 2CmJjXdTefXtUKAQCoW7iO2YlmVMvb5j X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTE2MDA2NCBTYWx0ZWRfX5jljNodJ5dDP cwWO0gTZquus4sQaMM/Q3RpcwK8h3aTUO0gJ1sH2/Xsgx87mFcP91u9ta/6PLV4fUhkFxyiC23I DB9YZc+zk1oPb/KqihcIxwJmUmifoThj+ap9d/v9W7fbZkmURltRQgm/o86qTq98ERw0Ge+ZJd+ SqzjS49FYNtdqrqSOJyBNeU4mazhLerN6UFI33c5rWfneeIvgZYApp42eo3F6vAW3LCOCoFHGSn YhSh11xHAxEfRle26JU4wYQNTlvR8vKGh00UoBY2bjsDgEzOQgL5LZg9Rqew0zqei6NWxAUcSRt id3etUpxl2MnitSj6tXCCUsFvZjhTph5WhAEl7xb4Cvk0DHjPjXDGWeZ07Eshrsuz2L7Amx0lAX EeNqCBkQi5d6H2dSwYWGZGJIBLX3h1xoGIUsxiTb6ASYqWlOlDIIZS85VMKV6dvb1bfejYe+ On 15/05/2025 22:50, Catherine Hoang wrote: >>> Are you asking if _require_xfs_io_command should seek out the filesystem >>> block size, and use that for the buffer and write size arguments instead >>> of hardcoding 4k? For atomic writes, maybe it should be doing this, >>> since the fs blocksize could be 64k. >> I was just a bit thrown by how we need to specify -b $size with -A to actually write $size atomically. > There was a discussion about this a while back about why -b $bsize > was needed when using pwrite, although I’m not sure if it still applies > or if the way atomic writes works has been changed since then. > > https://lore.kernel.org/linux-xfs/ > a6a2dc60f34ac353e5ea628a9ea1feba4800be7a.camel@linux.ibm.com/ Yes, and the xfs_io behaviour for -A is my focus here. I don't like how it splits by default (for $size > default blocksize). We could have had behaviour that default blocksize for -A is $size. Maybe that just complicates things. Anyway, I think that ship has sailed. Thanks, John