diff options
| -rw-r--r-- | config.c | 3 | ||||
| -rw-r--r-- | git-compat-util.h | 1 | ||||
| -rw-r--r-- | object-file.c | 16 | ||||
| -rw-r--r-- | packfile.c | 4 | ||||
| -rw-r--r-- | read-cache.c | 3 |
5 files changed, 22 insertions, 5 deletions
@@ -3051,7 +3051,8 @@ int git_config_set_multivar_in_file_gently(const char *config_filename, if (contents == MAP_FAILED) { if (errno == ENODEV && S_ISDIR(st.st_mode)) errno = EISDIR; - error_errno(_("unable to mmap '%s'"), config_filename); + error_errno(_("unable to mmap '%s'%s"), + config_filename, mmap_os_err()); ret = CONFIG_INVALID_FILE; contents = NULL; goto out_free; diff --git a/git-compat-util.h b/git-compat-util.h index fb6e9af76b..fa6dd92219 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -876,6 +876,7 @@ char *xstrndup(const char *str, size_t len); void *xrealloc(void *ptr, size_t size); void *xcalloc(size_t nmemb, size_t size); void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); +const char *mmap_os_err(void); void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); int xopen(const char *path, int flags, ...); ssize_t xread(int fd, void *buf, size_t len); diff --git a/object-file.c b/object-file.c index f233b440b2..b9c3219793 100644 --- a/object-file.c +++ b/object-file.c @@ -1023,12 +1023,26 @@ void *xmmap_gently(void *start, size_t length, return ret; } +const char *mmap_os_err(void) +{ + static const char blank[] = ""; +#if defined(__linux__) + if (errno == ENOMEM) { + /* this continues an existing error message: */ + static const char enomem[] = +", check sys.vm.max_map_count and/or RLIMIT_DATA"; + return enomem; + } +#endif /* OS-specific bits */ + return blank; +} + void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset) { void *ret = xmmap_gently(start, length, prot, flags, fd, offset); if (ret == MAP_FAILED) - die_errno(_("mmap failed")); + die_errno(_("mmap failed%s"), mmap_os_err()); return ret; } diff --git a/packfile.c b/packfile.c index 755aa7aec5..9ef6d98292 100644 --- a/packfile.c +++ b/packfile.c @@ -652,8 +652,8 @@ unsigned char *use_pack(struct packed_git *p, PROT_READ, MAP_PRIVATE, p->pack_fd, win->offset); if (win->base == MAP_FAILED) - die_errno("packfile %s cannot be mapped", - p->pack_name); + die_errno(_("packfile %s cannot be mapped%s"), + p->pack_name, mmap_os_err()); if (!win->offset && win->len == p->pack_size && !p->do_not_close) close_pack_fd(p); diff --git a/read-cache.c b/read-cache.c index 77961a3885..a80902155c 100644 --- a/read-cache.c +++ b/read-cache.c @@ -2236,7 +2236,8 @@ int do_read_index(struct index_state *istate, const char *path, int must_exist) mmap = xmmap_gently(NULL, mmap_size, PROT_READ, MAP_PRIVATE, fd, 0); if (mmap == MAP_FAILED) - die_errno(_("%s: unable to map index file"), path); + die_errno(_("%s: unable to map index file%s"), path, + mmap_os_err()); close(fd); hdr = (const struct cache_header *)mmap; |