On 08/03/2024 20:25, Ritesh Harjani (IBM) wrote: Hi Ritesh,
Currently ext4 exposes [fsawu_min, fsawu_max] size as [blocksize, clustersize] (given the hw block device constraints are larger than FS atomic write units). That means a user should be allowed to - 1. pwrite 0 4k /mnt/test/f1 2. pwrite 0 16k /mnt/test/f1
Previously you have mentioned 2 or 3 methods in which ext4 could support atomic writes. To avoid doubt, is this patch for the "Add intelligence in multi-block allocator of ext4 to provide aligned allocations (this option won't require any formatting)" method mentioned at https://lore.kernel.org/linux-fsdevel/8734tb0xx7.fsf@xxxxxxx/
and same as method 3 at https://lore.kernel.org/linux-fsdevel/cover.1709356594.git.ritesh.list@xxxxxxxxx/?
Thanks, John
