kernel/linux.git/include/linux/sunrpc/svc.h, branch v6.19.11

SUNRPC: Update svcxdr_init_decode() to call xdr_set_scratch_folio()

2025-09-23T17:29:50+00:00

The only snag here is that __folio_alloc_node() doesn't handle NUMA_NO_NODE, so I also need to update svc_pool_map_get_node() to return numa_mem_id() instead. I arrived at this approach by looking at what other users of __folio_alloc_node() do for this case. Signed-off-by: Anna Schumaker

sunrpc: rearrange struct svc_rqst for fewer cachelines

2025-07-14T16:46:49+00:00

This shrinks the struct by 4 bytes, but also takes it from 19 to 18 cachelines on x86_64. Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever

SUNRPC: Bump the maximum payload size for the server

2025-05-15T20:16:28+00:00

Increase the maximum server-side RPC payload to 4MB. The default remains at 1MB. An API to adjust the operational maximum was added in 2006 by commit 596bbe53eb3a ("[PATCH] knfsd: Allow max size of NFSd payload to be configured"). To adjust the operational maximum using this API, shut down the NFS server. Then echo a new value into: /proc/fs/nfsd/max_block_size And restart the NFS server. Reviewed-by: Jeff Layton Reviewed-by: NeilBrown Signed-off-by: Chuck Lever

sunrpc: Remove the RPCSVC_MAXPAGES macro

2025-05-15T20:16:27+00:00

It is no longer used. Reviewed-by: Jeff Layton Reviewed-by: NeilBrown Signed-off-by: Chuck Lever

SUNRPC: Remove svc_rqst :: rq_vec

2025-05-15T20:16:25+00:00

Clean up: This array is no longer used. On a system with 8-byte pointers and 4KB pages, pahole reports that the rq_vec[] array accounts for 4144 bytes. Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever

SUNRPC: Remove svc_fill_write_vector()

2025-05-15T20:16:25+00:00

Clean up: This API is no longer used. Signed-off-by: Chuck Lever

NFSD: De-duplicate the svc_fill_write_vector() call sites

2025-05-15T20:16:23+00:00

All three call sites do the same thing. I'm struggling with this a bit, however. struct xdr_buf is an XDR layer object and unmarshaling a WRITE payload is clearly a task intended to be done by the proc and xdr functions, not by VFS. This feels vaguely like a layering violation. Signed-off-by: Chuck Lever

sunrpc: Replace the rq_bvec array with dynamically-allocated memory

2025-05-15T20:16:23+00:00

As a step towards making NFSD's maximum rsize and wsize variable at run-time, replace the fixed-size rq_bvec[] array in struct svc_rqst with a chunk of dynamically-allocated memory. The rq_bvec[] array contains enough bio_vecs to handle each page in a maximum size RPC message. On a system with 8-byte pointers and 4KB pages, pahole reports that the rq_bvec[] array is 4144 bytes. This patch replaces that array with a single 8-byte pointer field. Reviewed-by: Jeff Layton Reviewed-by: NeilBrown Signed-off-by: Chuck Lever

sunrpc: Replace the rq_pages array with dynamically-allocated memory

2025-05-15T20:16:22+00:00

As a step towards making NFSD's maximum rsize and wsize variable at run-time, replace the fixed-size rq_vec[] array in struct svc_rqst with a chunk of dynamically-allocated memory. On a system with 8-byte pointers and 4KB pages, pahole reports that the rq_pages[] array is 2080 bytes. This patch replaces that with a single 8-byte pointer field. Reviewed-by: Jeff Layton Reviewed-by: NeilBrown Signed-off-by: Chuck Lever

sunrpc: Add a helper to derive maxpages from sv_max_mesg

2025-05-15T20:16:21+00:00

This page count is to be used to allocate various arrays of pages and bio_vecs, replacing the fixed RPCSVC_MAXPAGES value. The documenting comment is somewhat stale -- of course NFSv4 COMPOUND procedures may have multiple payloads. Reviewed-by: Jeff Layton Reviewed-by: NeilBrown Signed-off-by: Chuck Lever