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| author | Frans Kaashoek <[email protected]> | 2020-11-05 11:09:21 -0500 |
|---|---|---|
| committer | Frans Kaashoek <[email protected]> | 2020-11-05 12:27:32 -0500 |
| commit | b63d3506e9fbe7db1cd117db746fb58b7712ab4f (patch) | |
| tree | 212818e5f08e4bca1675013e3ccae18e1a4974aa | |
| parent | 774288e05a5891a4de0a165e2a65665714f6ca34 (diff) | |
| download | xv6-labs-b63d3506e9fbe7db1cd117db746fb58b7712ab4f.tar.gz xv6-labs-b63d3506e9fbe7db1cd117db746fb58b7712ab4f.tar.bz2 xv6-labs-b63d3506e9fbe7db1cd117db746fb58b7712ab4f.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; |