Qun-Wei Lin <qun-wei.lin@xxxxxxxxxxxx> writes: > This patchset introduces 2 new feature flags, BLK_FEAT_READ_SYNCHRONOUS and > SWP_READ_SYNCHRONOUS_IO. > > These changes are motivated by the need to better accommodate certain swap > devices that support synchronous read operations but asynchronous write > operations. > > The existing BLK_FEAT_SYNCHRONOUS and SWP_SYNCHRONOUS_IO flags are not > sufficient for these devices, as they enforce synchronous behavior for both > read and write operations. Which kind of device needs this? Read fast, but write slow? -- Best Regards, Huang, Ying
