Re: [dpdk-dev] [PATCH 4/7] Move EAL common functions

[Ravi Kerur <rkerur@gmail.com>]

On Fri, Dec 26, 2014 at 6:42 AM, Neil Horman <nhorman@tuxdriver.com> wrote:

> On Thu, Dec 25, 2014 at 11:17:41AM -0800, Ravi Kerur wrote:
> > Inline <rk>
> >
> > On Thu, Dec 25, 2014 at 9:44 AM, Neil Horman <nhorman@tuxdriver.com>
> wrote:
> >
> > > On Thu, Dec 25, 2014 at 10:33:14AM -0500, Ravi Kerur wrote:
> > > > Move common functions in eal.c to librte_eal/common directory.
> > > > Use RTE_EXEC_ENV_BSDAPP to differentiate minor differences in
> > > > common functions.
> > > > Makefile changes to reflect new file.
> > > > Fix checkpatch warnings and errors.
> > > >
> > > > Signed-off-by: Ravi Kerur <rkerur@gmail.com>
> > > > ---
> > > >  lib/librte_eal/bsdapp/eal/Makefile    |   1 +
> > > >  lib/librte_eal/bsdapp/eal/eal.c       | 233 +-----------------------
> > > >  lib/librte_eal/common/eal_common.c    | 328
> > > ++++++++++++++++++++++++++++++++++
> > > >  lib/librte_eal/common/eal_externs.h   |  42 +++++
> > > >  lib/librte_eal/common/eal_hugepages.h |   1 +
> > > >  lib/librte_eal/common/eal_private.h   |  47 +++++
> > > >  lib/librte_eal/linuxapp/eal/Makefile  |   1 +
> > > >  lib/librte_eal/linuxapp/eal/eal.c     | 246
> ++-----------------------
> > > >  8 files changed, 439 insertions(+), 460 deletions(-)
> > > >  create mode 100644 lib/librte_eal/common/eal_common.c
> > > >  create mode 100644 lib/librte_eal/common/eal_externs.h
> > > >
> > > > diff --git a/lib/librte_eal/bsdapp/eal/Makefile
> > > b/lib/librte_eal/bsdapp/eal/Makefile
> > > > index 92dd9a6..050d70b 100644
> > > > --- a/lib/librte_eal/bsdapp/eal/Makefile
> > > > +++ b/lib/librte_eal/bsdapp/eal/Makefile
> > > > @@ -58,6 +58,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) +=
> > > eal_interrupts.c
> > > >  SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_alarm.c
> > > >
> > > >  # from common dir
> > > > +SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common.c
> > > >  SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_memzone.c
> > > >  SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_log.c
> > > >  SRCS-$(CONFIG_RTE_LIBRTE_EAL_BSDAPP) += eal_common_launch.c
> > > > diff --git a/lib/librte_eal/bsdapp/eal/eal.c
> > > b/lib/librte_eal/bsdapp/eal/eal.c
> > > > index 69f3c03..f925da7 100644
> > > > --- a/lib/librte_eal/bsdapp/eal/eal.c
> > > > +++ b/lib/librte_eal/bsdapp/eal/eal.c
> > > > @@ -80,30 +80,10 @@
> > > >  #include "eal_filesystem.h"
> > > >  #include "eal_hugepages.h"
> > > >  #include "eal_options.h"
> > > > +#include "eal_externs.h"
> > > >
> > > >  #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
> > > >
> > > > -/* Allow the application to print its usage message too if set */
> > > > -static rte_usage_hook_t      rte_application_usage_hook = NULL;
> > > > -/* early configuration structure, when memory config is not mmapped
> */
> > > > -static struct rte_mem_config early_mem_config;
> > > > -
> > > > -/* define fd variable here, because file needs to be kept open for
> the
> > > > - * duration of the program, as we hold a write lock on it in the
> > > primary proc */
> > > > -static int mem_cfg_fd = -1;
> > > > -
> > > > -static struct flock wr_lock = {
> > > > -             .l_type = F_WRLCK,
> > > > -             .l_whence = SEEK_SET,
> > > > -             .l_start = offsetof(struct rte_mem_config, memseg),
> > > > -             .l_len = sizeof(early_mem_config.memseg),
> > > > -};
> > > > -
> > > > -/* Address of global and public configuration */
> > > > -static struct rte_config rte_config = {
> > > > -             .mem_config = &early_mem_config,
> > > > -};
> > > > -
> > > >  /* internal configuration (per-core) */
> > > >  struct lcore_config lcore_config[RTE_MAX_LCORE];
> > > >
> > > > @@ -113,93 +93,14 @@ struct internal_config internal_config;
> > > >  /* used by rte_rdtsc() */
> > > >  int rte_cycles_vmware_tsc_map;
> > > >
> > > > -/* Return a pointer to the configuration structure */
> > > > -struct rte_config *
> > > > -rte_eal_get_configuration(void)
> > > > +inline void *
> > > > +rte_eal_get_mem_cfg_addr(void)
> > > >  {
> > > > -     return &rte_config;
> > > > -}
> > > > -
> > > > -/* parse a sysfs (or other) file containing one integer value */
> > > > -int
> > > > -eal_parse_sysfs_value(const char *filename, unsigned long *val)
> > > > -{
> > > > -     FILE *f;
> > > > -     char buf[BUFSIZ];
> > > > -     char *end = NULL;
> > > > -
> > > > -     if ((f = fopen(filename, "r")) == NULL) {
> > > > -             RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
> > > > -                     __func__, filename);
> > > > -             return -1;
> > > > -     }
> > > > -
> > > > -     if (fgets(buf, sizeof(buf), f) == NULL) {
> > > > -             RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
> > > > -                     __func__, filename);
> > > > -             fclose(f);
> > > > -             return -1;
> > > > -     }
> > > > -     *val = strtoul(buf, &end, 0);
> > > > -     if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
> > > > -             RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value
> %s\n",
> > > > -                             __func__, filename);
> > > > -             fclose(f);
> > > > -             return -1;
> > > > -     }
> > > > -     fclose(f);
> > > > -     return 0;
> > > > -}
> > > > -
> > > > -
> > > > -/* create memory configuration in shared/mmap memory. Take out
> > > > - * a write lock on the memsegs, so we can auto-detect
> primary/secondary.
> > > > - * This means we never close the file while running (auto-close on
> > > exit).
> > > > - * We also don't lock the whole file, so that in future we can use
> > > read-locks
> > > > - * on other parts, e.g. memzones, to detect if there are running
> > > secondary
> > > > - * processes. */
> > > > -static void
> > > > -rte_eal_config_create(void)
> > > > -{
> > > > -     void *rte_mem_cfg_addr;
> > > > -     int retval;
> > > > -
> > > > -     const char *pathname = eal_runtime_config_path();
> > > > -
> > > > -     if (internal_config.no_shconf)
> > > > -             return;
> > > > -
> > > > -     if (mem_cfg_fd < 0){
> > > > -             mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
> > > > -             if (mem_cfg_fd < 0)
> > > > -                     rte_panic("Cannot open '%s' for
> rte_mem_config\n",
> > > pathname);
> > > > -     }
> > > > -
> > > > -     retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
> > > > -     if (retval < 0){
> > > > -             close(mem_cfg_fd);
> > > > -             rte_panic("Cannot resize '%s' for rte_mem_config\n",
> > > pathname);
> > > > -     }
> > > > -
> > > > -     retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
> > > > -     if (retval < 0){
> > > > -             close(mem_cfg_fd);
> > > > -             rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is
> > > another primary "
> > > > -                             "process running?\n", pathname);
> > > > -     }
> > > > -
> > > > -     rte_mem_cfg_addr = mmap(NULL, sizeof(*rte_config.mem_config),
> > > > -                             PROT_READ | PROT_WRITE, MAP_SHARED,
> > > mem_cfg_fd, 0);
> > > > -
> > > > -     if (rte_mem_cfg_addr == MAP_FAILED){
> > > > -             rte_panic("Cannot mmap memory for rte_config\n");
> > > > -     }
> > > > -     memcpy(rte_mem_cfg_addr, &early_mem_config,
> > > sizeof(early_mem_config));
> > > > -     rte_config.mem_config = (struct rte_mem_config *)
> rte_mem_cfg_addr;
> > > > +     return NULL;
> > > >  }
> > > >
> > > >  /* attach to an existing shared memory config */
> > > > -static void
> > > > +void
> > > >  rte_eal_config_attach(void)
> > > >  {
> > > >       void *rte_mem_cfg_addr;
> > > > @@ -223,44 +124,11 @@ rte_eal_config_attach(void)
> > > >       rte_config.mem_config = (struct rte_mem_config *)
> rte_mem_cfg_addr;
> > > >  }
> > > >
> > > > -/* Detect if we are a primary or a secondary process */
> > > > -enum rte_proc_type_t
> > > > -eal_proc_type_detect(void)
> > > > +/* NOP for BSD */
> > > > +void
> > > > +rte_eal_config_reattach(void)
> > > >  {
> > > > -     enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
> > > > -     const char *pathname = eal_runtime_config_path();
> > > > -
> > > > -     /* if we can open the file but not get a write-lock we are a
> > > secondary
> > > > -      * process. NOTE: if we get a file handle back, we keep that
> open
> > > > -      * and don't close it to prevent a race condition between
> multiple
> > > opens */
> > > > -     if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
> > > > -                     (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
> > > > -             ptype = RTE_PROC_SECONDARY;
> > > > -
> > > > -     RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
> > > > -                     ptype == RTE_PROC_PRIMARY ? "PRIMARY" :
> > > "SECONDARY");
> > > >
> > > > -     return ptype;
> > > > -}
> > > > -
> > > > -/* Sets up rte_config structure with the pointer to shared memory
> > > config.*/
> > > > -static void
> > > > -rte_config_init(void)
> > > > -{
> > > > -     rte_config.process_type = internal_config.process_type;
> > > > -
> > > > -     switch (rte_config.process_type){
> > > > -     case RTE_PROC_PRIMARY:
> > > > -             rte_eal_config_create();
> > > > -             break;
> > > > -     case RTE_PROC_SECONDARY:
> > > > -             rte_eal_config_attach();
> > > > -             rte_eal_mcfg_wait_complete(rte_config.mem_config);
> > > > -             break;
> > > > -     case RTE_PROC_AUTO:
> > > > -     case RTE_PROC_INVALID:
> > > > -             rte_panic("Invalid process type\n");
> > > > -     }
> > > >  }
> > > >
> > > >  /* display usage */
> > > > @@ -276,37 +144,6 @@ eal_usage(const char *prgname)
> > > >       }
> > > >  }
> > > >
> > > > -/* Set a per-application usage message */
> > > > -rte_usage_hook_t
> > > > -rte_set_application_usage_hook( rte_usage_hook_t usage_func )
> > > > -{
> > > > -     rte_usage_hook_t        old_func;
> > > > -
> > > > -     /* Will be NULL on the first call to denote the last usage
> > > routine. */
> > > > -     old_func                                        =
> > > rte_application_usage_hook;
> > > > -     rte_application_usage_hook      = usage_func;
> > > > -
> > > > -     return old_func;
> > > > -}
> > > > -
> > > > -static inline size_t
> > > > -eal_get_hugepage_mem_size(void)
> > > > -{
> > > > -     uint64_t size = 0;
> > > > -     unsigned i, j;
> > > > -
> > > > -     for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
> > > > -             struct hugepage_info *hpi =
> > > &internal_config.hugepage_info[i];
> > > > -             if (hpi->hugedir != NULL) {
> > > > -                     for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
> > > > -                             size += hpi->hugepage_sz *
> > > hpi->num_pages[j];
> > > > -                     }
> > > > -             }
> > > > -     }
> > > > -
> > > > -     return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
> > > > -}
> > > > -
> > > >  /* Parse the argument given in the command line of the application
> */
> > > >  static int
> > > >  eal_parse_args(int argc, char **argv)
> > > > @@ -374,45 +211,6 @@ eal_parse_args(int argc, char **argv)
> > > >       return ret;
> > > >  }
> > > >
> > > > -static void
> > > > -eal_check_mem_on_local_socket(void)
> > > > -{
> > > > -     const struct rte_memseg *ms;
> > > > -     int i, socket_id;
> > > > -
> > > > -     socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
> > > > -
> > > > -     ms = rte_eal_get_physmem_layout();
> > > > -
> > > > -     for (i = 0; i < RTE_MAX_MEMSEG; i++)
> > > > -             if (ms[i].socket_id == socket_id &&
> > > > -                             ms[i].len > 0)
> > > > -                     return;
> > > > -
> > > > -     RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
> > > > -                     "memory on local socket!\n");
> > > > -}
> > > > -
> > > > -static int
> > > > -sync_func(__attribute__((unused)) void *arg)
> > > > -{
> > > > -     return 0;
> > > > -}
> > > > -
> > > > -inline static void
> > > > -rte_eal_mcfg_complete(void)
> > > > -{
> > > > -     /* ALL shared mem_config related INIT DONE */
> > > > -     if (rte_config.process_type == RTE_PROC_PRIMARY)
> > > > -             rte_config.mem_config->magic = RTE_MAGIC;
> > > > -}
> > > > -
> > > > -/* return non-zero if hugepages are enabled. */
> > > > -int rte_eal_has_hugepages(void)
> > > > -{
> > > > -     return !internal_config.no_hugetlbfs;
> > > > -}
> > > > -
> > > >  /* Abstraction for port I/0 privilege */
> > > >  int
> > > >  rte_eal_iopl_init(void)
> > > > @@ -476,7 +274,7 @@ rte_eal_init(int argc, char **argv)
> > > >
> > > >       rte_srand(rte_rdtsc());
> > > >
> > > > -     rte_config_init();
> > > > +     rte_eal_config_init();
> > > >
> > > >       if (rte_eal_memory_init() < 0)
> > > >               rte_panic("Cannot init memory\n");
> > > > @@ -548,16 +346,3 @@ rte_eal_init(int argc, char **argv)
> > > >       return fctret;
> > > >  }
> > > >
> > > > -/* get core role */
> > > > -enum rte_lcore_role_t
> > > > -rte_eal_lcore_role(unsigned lcore_id)
> > > > -{
> > > > -     return (rte_config.lcore_role[lcore_id]);
> > > > -}
> > > > -
> > > > -enum rte_proc_type_t
> > > > -rte_eal_process_type(void)
> > > > -{
> > > > -     return (rte_config.process_type);
> > > > -}
> > > > -
> > > > diff --git a/lib/librte_eal/common/eal_common.c
> > > b/lib/librte_eal/common/eal_common.c
> > > > new file mode 100644
> > > > index 0000000..becf9c8
> > > > --- /dev/null
> > > > +++ b/lib/librte_eal/common/eal_common.c
> > > > @@ -0,0 +1,328 @@
> > > > +/*-
> > > > + *   BSD LICENSE
> > > > + *
> > > > + *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
> > > > + *   Copyright(c) 2014 6WIND S.A.
> > > > + *   All rights reserved.
> > > > + *
> > > > + *   Redistribution and use in source and binary forms, with or
> without
> > > > + *   modification, are permitted provided that the following
> conditions
> > > > + *   are met:
> > > > + *
> > > > + *     * Redistributions of source code must retain the above
> copyright
> > > > + *       notice, this list of conditions and the following
> disclaimer.
> > > > + *     * Redistributions in binary form must reproduce the above
> > > copyright
> > > > + *       notice, this list of conditions and the following
> disclaimer in
> > > > + *       the documentation and/or other materials provided with the
> > > > + *       distribution.
> > > > + *     * Neither the name of Intel Corporation nor the names of its
> > > > + *       contributors may be used to endorse or promote products
> derived
> > > > + *       from this software without specific prior written
> permission.
> > > > + *
> > > > + *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
> CONTRIBUTORS
> > > > + *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
> NOT
> > > > + *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
> FITNESS
> > > FOR
> > > > + *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
> > > COPYRIGHT
> > > > + *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
> > > INCIDENTAL,
> > > > + *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
> NOT
> > > > + *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
> OF
> > > USE,
> > > > + *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
> ON
> > > ANY
> > > > + *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
> TORT
> > > > + *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
> THE
> > > USE
> > > > + *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
> > > DAMAGE.
> > > > + */
> > > > +
> > > > +#include <stdio.h>
> > > > +#include <stdlib.h>
> > > > +#include <stdint.h>
> > > > +#include <string.h>
> > > > +#include <stdarg.h>
> > > > +#include <unistd.h>
> > > > +#include <pthread.h>
> > > > +#include <syslog.h>
> > > > +#include <getopt.h>
> > > > +#include <sys/file.h>
> > > > +#include <stddef.h>
> > > > +#include <errno.h>
> > > > +#include <limits.h>
> > > > +#include <errno.h>
> > > > +#include <sys/mman.h>
> > > > +#include <sys/queue.h>
> > > > +
> > > > +#include <rte_common.h>
> > > > +#include <rte_debug.h>
> > > > +#include <rte_memory.h>
> > > > +#include <rte_memzone.h>
> > > > +#include <rte_launch.h>
> > > > +#include <rte_tailq.h>
> > > > +#include <rte_eal.h>
> > > > +#include <rte_eal_memconfig.h>
> > > > +#include <rte_per_lcore.h>
> > > > +#include <rte_lcore.h>
> > > > +#include <rte_log.h>
> > > > +#include <rte_random.h>
> > > > +#include <rte_cycles.h>
> > > > +#include <rte_string_fns.h>
> > > > +#include <rte_cpuflags.h>
> > > > +#include <rte_interrupts.h>
> > > > +#include <rte_pci.h>
> > > > +#include <rte_dev.h>
> > > > +#include <rte_devargs.h>
> > > > +#include <rte_common.h>
> > > > +#include <rte_version.h>
> > > > +#include <rte_atomic.h>
> > > > +#include <malloc_heap.h>
> > > > +#include <rte_eth_ring.h>
> > > > +
> > > > +#include "eal_private.h"
> > > > +#include "eal_thread.h"
> > > > +#include "eal_internal_cfg.h"
> > > > +#include "eal_filesystem.h"
> > > > +#include "eal_hugepages.h"
> > > > +#include "eal_options.h"
> > > > +
> > > > +/* Allow the application to print its usage message too if set */
> > > > +rte_usage_hook_t rte_application_usage_hook = NULL;
> > > > +
> > > > +/* define fd variable here, because file needs to be kept open for
> the
> > > > + * duration of the program, as we hold a write lock on it in the
> > > primary proc */
> > > > +int mem_cfg_fd = -1;
> > > > +
> > > > +/* early configuration structure, when memory config is not mmapped
> */
> > > > +static struct rte_mem_config early_mem_config;
> > > > +
> > > > +/* Address of global and public configuration */
> > > > +struct rte_config rte_config = {
> > > > +             .mem_config = &early_mem_config,
> > > > +};
> > > > +
> > > > +static struct flock wr_lock = {
> > > > +             .l_type = F_WRLCK,
> > > > +             .l_whence = SEEK_SET,
> > > > +             .l_start = offsetof(struct rte_mem_config, memseg),
> > > > +             .l_len = sizeof(early_mem_config.memseg),
> > > > +};
> > > > +
> > > > +/* Return a pointer to the configuration structure */
> > > > +struct rte_config *
> > > > +rte_eal_get_configuration(void)
> > > > +{
> > > > +     return &rte_config;
> > > > +}
> > > > +
> > > > +/* parse a sysfs (or other) file containing one integer value */
> > > > +int
> > > > +eal_parse_sysfs_value(const char *filename, unsigned long *val)
> > > > +{
> > > > +     FILE *f;
> > > > +     char buf[BUFSIZ];
> > > > +     char *end = NULL;
> > > > +
> > > > +     f = fopen(filename, "r");
> > > > +     if (f == NULL) {
> > > > +             RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
> > > > +                     __func__, filename);
> > > > +             return -1;
> > > > +     }
> > > > +
> > > > +     if (fgets(buf, sizeof(buf), f) == NULL) {
> > > > +             RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
> > > > +                     __func__, filename);
> > > > +             fclose(f);
> > > > +             return -1;
> > > > +     }
> > > > +     *val = strtoul(buf, &end, 0);
> > > > +     if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
> > > > +             RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value
> %s\n",
> > > > +                             __func__, filename);
> > > > +             fclose(f);
> > > > +             return -1;
> > > > +     }
> > > > +     fclose(f);
> > > > +     return 0;
> > > > +}
> > > > +
> > > > +
> > > > +/* create memory configuration in shared/mmap memory. Take out
> > > > + * a write lock on the memsegs, so we can auto-detect
> primary/secondary.
> > > > + * This means we never close the file while running (auto-close on
> > > exit).
> > > > + * We also don't lock the whole file, so that in future we can use
> > > read-locks
> > > > + * on other parts, e.g. memzones, to detect if there are running
> > > secondary
> > > > + * processes. */
> > > > +static void
> > > > +rte_eal_config_create(void)
> > > > +{
> > > > +     void *rte_mem_cfg_addr;
> > > > +     int retval;
> > > > +
> > > > +     const char *pathname = eal_runtime_config_path();
> > > > +
> > > > +     if (internal_config.no_shconf)
> > > > +             return;
> > > > +
> > > > +     rte_mem_cfg_addr = rte_eal_get_mem_cfg_addr();
> > > > +
> > > > +     if (mem_cfg_fd < 0) {
> > > > +             mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
> > > > +             if (mem_cfg_fd < 0)
> > > > +                     rte_panic("Cannot open '%s' for
> rte_mem_config\n",
> > > > +                                     pathname);
> > > > +     }
> > > > +
> > > > +     retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
> > > > +     if (retval < 0) {
> > > > +             close(mem_cfg_fd);
> > > > +             rte_panic("Cannot resize '%s' for rte_mem_config\n",
> > > pathname);
> > > > +     }
> > > > +
> > > > +     retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
> > > > +     if (retval < 0) {
> > > > +             close(mem_cfg_fd);
> > > > +             rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. "
> > > > +                     "Is another primary process running?\n",
> pathname);
> > > > +     }
> > > > +
> > > > +     rte_mem_cfg_addr = mmap(rte_mem_cfg_addr,
> > > > +                     sizeof(*rte_config.mem_config), PROT_READ |
> > > PROT_WRITE,
> > > > +                     MAP_SHARED, mem_cfg_fd, 0);
> > > > +
> > > > +     if (rte_mem_cfg_addr == MAP_FAILED)
> > > > +             rte_panic("Cannot mmap memory for rte_config\n");
> > > > +
> > > > +     memcpy(rte_mem_cfg_addr, &early_mem_config,
> > > sizeof(early_mem_config));
> > > > +     rte_config.mem_config = (struct rte_mem_config *)
> rte_mem_cfg_addr;
> > > > +
> > > > +#ifndef RTE_EXEC_ENV_BSDAPP
> > > > +     /* store address of the config in the config itself so that
> > > secondary
> > > > +      * processes could later map the config into this exact
> location
> > > > +      */
> > > > +     rte_config.mem_config->mem_cfg_addr = (uintptr_t)
> rte_mem_cfg_addr;
> > > > +#endif /* RTE_EXEC_ENV_BSDAPP */
> > > Why is this a BSD/Linux Differentiator?
> > >
> >
> > <rk> Existing code where assignment is not present in BSD code hence the
> > differentiation.
> >
> I presume then that the BSD code doesn't use mem_cfg_addr at all?  If so,
> why
> not just assign it unilaterally and avoid the ifdeffery?
> Neil
>
>
<rk> Looking into the code my understanding it's not being used. I will
assign it unilaterally.


> > > Neil
> > >
> > >
>