Re: [PATCH v4 1/9] statx: add direct I/O alignment information
From: "Martin K. Petersen" <martin.petersen@oracle.com>
Date: 2022-07-22 17:32:09
Also in:
linux-block, linux-ext4, linux-f2fs-devel, linux-fscrypt, linux-fsdevel, linux-xfs, lkml
Eric,
Therefore, let's expose this information via statx(). Add the STATX_DIOALIGN flag and two new statx fields associated with it: * stx_dio_mem_align: the alignment (in bytes) required for user memory buffers for DIO, or 0 if DIO is not supported on the file. * stx_dio_offset_align: the alignment (in bytes) required for file offsets and I/O segment lengths for DIO, or 0 if DIO is not supported on the file. This will only be nonzero if stx_dio_mem_align is nonzero, and vice versa.
Nice to finally have a generic interface for this! Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> -- Martin K. Petersen Oracle Linux Engineering