P9FS_MTU
if (clnt->msize > P9FS_MTU) {
clnt->msize, P9FS_MTU);
alloc_msize = P9FS_MTU;
P9FS_MTU, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
clnt->msize = P9FS_MTU;
#define P9FS_IOUNIT (P9FS_MTU - 24)
P9FS_MTU, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
bzero(io_buffer, P9FS_MTU);