diff options
Diffstat (limited to 'klm/util/file_piece.cc')
| -rw-r--r-- | klm/util/file_piece.cc | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/klm/util/file_piece.cc b/klm/util/file_piece.cc index 67681f7e..f447a70c 100644 --- a/klm/util/file_piece.cc +++ b/klm/util/file_piece.cc @@ -237,7 +237,12 @@ void FilePiece::MMapShift(off_t desired_begin) throw() { // Forcibly clear the existing mmap first. data_.reset(); - data_.reset(mmap(NULL, mapped_size, PROT_READ, MAP_PRIVATE, *file_, mapped_offset), mapped_size, scoped_memory::MMAP_ALLOCATED); + data_.reset(mmap(NULL, mapped_size, PROT_READ, MAP_SHARED + // Populate where available on linux +#ifdef MAP_POPULATE + | MAP_POPULATE +#endif + , *file_, mapped_offset), mapped_size, scoped_memory::MMAP_ALLOCATED); if (data_.get() == MAP_FAILED) { if (desired_begin) { if (((off_t)-1) == lseek(*file_, desired_begin, SEEK_SET)) UTIL_THROW(ErrnoException, "mmap failed even though it worked before. lseek failed too, so using read isn't an option either."); |