diff options
| author | Frans Kaashoek <[email protected]> | 2020-11-05 11:09:21 -0500 |
|---|---|---|
| committer | Frans Kaashoek <[email protected]> | 2020-11-05 19:50:46 -0500 |
| commit | b4c2851bb347d5243a4498fdd9e1f0c9a23e6498 (patch) | |
| tree | 212818e5f08e4bca1675013e3ccae18e1a4974aa | |
| parent | 38084bcea84e79f5fff9ce8c7f91c077fc1eacd3 (diff) | |
| download | xv6-labs-b4c2851bb347d5243a4498fdd9e1f0c9a23e6498.tar.gz xv6-labs-b4c2851bb347d5243a4498fdd9e1f0c9a23e6498.tar.bz2 xv6-labs-b4c2851bb347d5243a4498fdd9e1f0c9a23e6498.zip | |
Be principled: acquire lock first
| -rw-r--r-- | kernel/log.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/log.c b/kernel/log.c index c8af5bd..2c0063a 100644 --- a/kernel/log.c +++ b/kernel/log.c @@ -216,12 +216,12 @@ log_write(struct buf *b) { int i; + acquire(&log.lock); if (log.lh.n >= LOGSIZE || log.lh.n >= log.size - 1) panic("too big a transaction"); if (log.outstanding < 1) panic("log_write outside of trans"); - acquire(&log.lock); for (i = 0; i < log.lh.n; i++) { if (log.lh.block[i] == b->blockno) // log absorbtion break; |