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- Log ----------------------------------------------------------------- commit 5ccc27cf77c936460b265c973a531a04b7a74014 Author: Matias Elo matias.elo@nokia.com Date: Thu Feb 14 17:19:12 2019 +0200

linux-gen: shm: replace ftruncate() with fallocate()

fallocate() reserves required memory at call time, so out of memory failures are easier to detect.

Signed-off-by: Matias Elo matias.elo@nokia.com Reviewed-by: Petri Savolainen petri.savolainen@nokia.com

diff --git a/platform/linux-generic/odp_ishm.c b/platform/linux-generic/odp_ishm.c index 875f9f9d..94a14549 100644 --- a/platform/linux-generic/odp_ishm.c +++ b/platform/linux-generic/odp_ishm.c @@ -256,6 +256,7 @@ static void procsync(void); static int hp_create_file(uint64_t len, const char *filename) { int fd; + int ret; void *addr;

if (len <= 0) { @@ -273,10 +274,19 @@ static int hp_create_file(uint64_t len, const char *filename) /* remove file from file system */ unlink(filename);

- if (ftruncate(fd, len) == -1) { - ODP_ERR("Could not truncate file: %s\n", strerror(errno)); - close(fd); - return -1; + ret = fallocate(fd, 0, 0, len); + if (ret == -1) { + if (errno == ENOTSUP) { + ODP_DBG("fallocate() not supported\n"); + ret = ftruncate(fd, len); + } + + if (ret == -1) { + ODP_ERR("memory allocation failed: fd=%d, err=%s.\n", + fd, strerror(errno)); + close(fd); + return -1; + } }

/* commit huge page */ @@ -637,6 +647,7 @@ static int create_file(int block_index, huge_flag_t huge, uint64_t len, * /mnt/huge */ int oflag = O_RDWR | O_CREAT | O_TRUNC; /* flags for open */ char dir[ISHM_FILENAME_MAXLEN]; + int ret;

/* No ishm_block_t for the master single VA memory file */ if (single_va) { @@ -676,12 +687,20 @@ static int create_file(int block_index, huge_flag_t huge, uint64_t len, return -1; }

- if (ftruncate(fd, len) == -1) { - ODP_ERR("ftruncate failed: fd=%d, err=%s.\n", - fd, strerror(errno)); - close(fd); - unlink(filename); - return -1; + ret = fallocate(fd, 0, 0, len); + if (ret == -1) { + if (errno == ENOTSUP) { + ODP_DBG("fallocate() not supported\n"); + ret = ftruncate(fd, len); + } + + if (ret == -1) { + ODP_ERR("memory allocation failed: fd=%d, err=%s.\n", + fd, strerror(errno)); + close(fd); + unlink(filename); + return -1; + } }

/* No export file is created since this is only for internal use.*/

-----------------------------------------------------------------------

Summary of changes: platform/linux-generic/odp_ishm.c | 39 +++++++++++++++++++++++++++++---------- 1 file changed, 29 insertions(+), 10 deletions(-)

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