From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> This set of patches represents an initial effort to convert the page cache I/O in the NFS client to use native folio functionality. It should allow the nfs_page structs and their helpers to carry folios (including folios of order > 0) and to pass their data contents through to the RPC layer. Note that because O_DIRECT uses pages, we still need to support the traditional page based I/O, and so the new struct nfs_page will carry both types. I did not touch the fscache code, but I expect that to be able to continue to work with order 0 folios. The plan is to merge this functionality with order 0 folios first, in order to catch any regressions in existing functionality. Then we can enable order n > 0 once we're happy about the stability (at least for the non-fscache case). At this point, the xfstests are all passing without any regressions on my setup, so I'm throwing the patches over the fence to allow for wider testing. Please make sure, in particular to test pNFS if your server supports it. I didn't have to make any changes to the pNFS code, and I don't expect any trouble, but it would be good to have validation of that assumption. --- v2: - Fix a bisectability issue reported by Anna - Remove an unnecessary NULL pointer check in nfs_read_folio() Trond Myklebust (18): NFS: Fix for xfstests generic/208 NFS: Add basic functionality for tracking folios in struct nfs_page NFS: Support folios in nfs_generic_pgio() NFS: Fix nfs_coalesce_size() to work with folios NFS: Add a helper to convert a struct nfs_page into an inode NFS: Convert the remaining pagelist helper functions to support folios NFS: Add a helper nfs_wb_folio() NFS: Convert buffered reads to use folios NFS: Convert the function nfs_wb_page() to use folios NFS: Convert buffered writes to use folios NFS: Remove unused function nfs_wb_page() NFS: Convert nfs_write_begin/end to use folios NFS: Fix up nfs_vm_page_mkwrite() for folios NFS: Clean up O_DIRECT request allocation NFS: fix up nfs_release_folio() to try to release the page NFS: Enable tracing of nfs_invalidate_folio() and nfs_launder_folio() NFS: Improve tracing of nfs_wb_folio() NFS: Remove unnecessary check in nfs_read_folio() fs/nfs/direct.c | 12 +- fs/nfs/file.c | 124 +++++++------ fs/nfs/internal.h | 38 ++-- fs/nfs/nfstrace.h | 58 ++++-- fs/nfs/pagelist.c | 217 +++++++++++++++++----- fs/nfs/pnfs.h | 10 +- fs/nfs/pnfs_nfs.c | 18 +- fs/nfs/read.c | 94 +++++----- fs/nfs/write.c | 380 ++++++++++++++++++++------------------- include/linux/nfs_fs.h | 7 +- include/linux/nfs_page.h | 79 +++++++- 11 files changed, 646 insertions(+), 391 deletions(-) -- 2.39.0
