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remove warning

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Summary:
st_blocks shows 16 though the right value is 8. This happens occasionally which seems a bug.
Closes https://github.com/facebook/rocksdb/pull/2160

Differential Revision: D4893542

Pulled By: lightmark

fbshipit-source-id: 68e832586b58bbc6162efbe83ce273f1570d5be3
This commit is contained in:
Aaron Gao 2017-04-14 18:43:55 -07:00
parent 95c5e2dc6e
commit 1265ed7abb
1 changed files with 1 additions and 9 deletions
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10
env/io_posix.cc vendored
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@ -772,17 +772,9 @@ Status PosixWritableFile::Close() {
fstat(fd_, &file_stats); fstat(fd_, &file_stats);
// After ftruncate, we check whether ftruncate has the correct behavior. // After ftruncate, we check whether ftruncate has the correct behavior.
// If not, we should hack it with FALLOC_FL_PUNCH_HOLE // If not, we should hack it with FALLOC_FL_PUNCH_HOLE
static bool buggy = false; if ((file_stats.st_size + file_stats.st_blksize - 1) /
if (!buggy && (file_stats.st_size + file_stats.st_blksize - 1) /
file_stats.st_blksize != file_stats.st_blksize !=
file_stats.st_blocks / (file_stats.st_blksize / 512)) { file_stats.st_blocks / (file_stats.st_blksize / 512)) {
fprintf(stderr,
"WARNING: Your kernel may be buggy (<= 4.0.x) and does not free "
"preallocated blocks on truncate. Hacking around it, but you "
"should upgrade!\n");
buggy = true;
}
if (buggy) {
IOSTATS_TIMER_GUARD(allocate_nanos); IOSTATS_TIMER_GUARD(allocate_nanos);
if (allow_fallocate_) { if (allow_fallocate_) {
fallocate(fd_, FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE, filesize_, fallocate(fd_, FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE, filesize_,