On Mon, Oct 10, 2016 at 05:24:38PM -0700, Song Liu wrote: > These are the 4th version of patches to enable write cache part of > raid5-cache. The journal part was released with kernel 4.4. > > The caching part uses same disk format of raid456 journal, and provides > acceleration to writes. Write operations are committed (bio_endio) once > the data is secured in journal. Reconstruct and RMW are postponed to > reclaim path, which is (hopefully) not on the critical path. > > The changes are organized in 8 patches (details below). > > Patch for chunk_aligned_read in earlier RFC is not included yet > (http://marc.info/?l=linux-raid&m=146432700719277). But we may still need > some optimizations later, especially for SSD raid devices. > > Changes from PATCH v3 (http://marc.info/?l=linux-raid&m=147573807306070): > 1. Make reclaim robust > 2. Fix a bug in recovery > > Changes between v3 and v2 (http://marc.info/?l=linux-raid&m=147493266208102): > 1. Incorporate feedback from Shaohua > 2. Reorganize the patches, for hopefully easier review > 3. Make sure no change to write through mode (journal only) > 4. Change reclaim design to avoid deadlock due to log space Could you please add a test case for this in mdadm test suites? Thanks, Shaohua -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
