| 6514cb18 | 16-Apr-2021 |
Alexander Motin <[email protected]> |
pms(4): Limit maximum I/O size to 256KB instead of 1MB.
There is a weird limit of AGTIAPI_MAX_DMA_SEGS (128) S/G segments per
I/O since the initial driver import. I don't know why it was added,
can
pms(4): Limit maximum I/O size to 256KB instead of 1MB.
There is a weird limit of AGTIAPI_MAX_DMA_SEGS (128) S/G segments per
I/O since the initial driver import. I don't know why it was added,
can only guess some hardware limitation, but in worst case it means
maximum I/O size of 508KB. Respect it to be safe, rounding to 256KB.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
(cherry picked from commit 3e347834200b5d91a33384e696793e4ac20a44d4)
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| e54a1d57 | 20-Jan-2021 |
Ryan Libby <[email protected]> |
pms: handle maximum size IO with any alignment
Define the maximum numbers of segments to allow for non-page alignment
at the beginning and end of a maxphys size transfer. Also set
ccb_pathinq.maxio
pms: handle maximum size IO with any alignment
Define the maximum numbers of segments to allow for non-page alignment
at the beginning and end of a maxphys size transfer. Also set
ccb_pathinq.maxio consistent with maxphys.
Reviewed by: imp
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D28043
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