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Diffstat (limited to 'Notes')
| -rw-r--r-- | Notes | 18 |
1 files changed, 15 insertions, 3 deletions
@@ -142,10 +142,22 @@ systematic way to test sleep races? do you have to be holding the mutex in order to call wakeup()? -should lock around printf, not putc - device interrupts don't clear FL_IF so a recursive timer interrupt is possible -the sleep/swtch/schedule code that holds over a lock is ugly +what does inode->busy mean? + might be held across disk reads + no-one is allowed to do anything to the inode + protected by inode_table_lock +inode->count counts in-memory pointers to the struct + prevents inode[] element from being re-used + protected by inode_table_lock + +blocks and inodes have ad-hoc sleep-locks + provide a single mechanism? + +need to lock bufs in bio between bread and brelse +test 14-character file names +and file arguments longer than 14 +and directories longer than one sector |