md/md-linear: Enable atomic writes #242
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All the infrastructure has already been plumbed to support this for stacked devices, so just enable the request_queue limits features flag. A note about chunk sectors for linear arrays: While it is possible to set a chunk sectors param for building a linear array, this is for specifying the granularity at which data sectors from the device are used. It is not the same as a stripe size, like for RAID0. As such, it is not appropriate to set chunk_sectors request queue limit to the same value, as chunk_sectors request limit is a boundary for which requests cannot straddle. However, request_queue limit max_hw_sectors is set to chunk sectors, which almost has the same effect as setting chunk_sectors limit. Signed-off-by: John Garry <john.g.garry@oracle.com>
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Upstream branch: c17fb54 |
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Pull request for series with
subject: md/md-linear: Enable atomic writes
version: 1
url: https://patchwork.kernel.org/project/linux-raid/list/?series=998498