Imbus/xv6-riscv-kernel
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rtm 2006-07-21 22:10:40 +00:00
parent 11a9947f1a
commit 9d3fb67141
7 changed files with 164 additions and 11 deletions
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@ -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