Julian Elischer wrote:
Ed Maste wrote:
On Mon, Aug 18, 2008 at 12:02:56PM -0400, Ryan Stone wrote:
On Mon, Aug 18, 2008 at 11:54 AM, Max Laier <[EMAIL PROTECTED]> wrote:
On Monday 18 August 2008 17:14:01 Ryan Stone wrote:
Are there any problems acquiring a sleep mutex after acquiring an sx
lock?
man 9 locking says that you can't, but doesn't provide any reasons.
[...]
Where does it say so? The interaction table clearly shows: [...]
Ahh, it seems ups' commit of rmlocks changed the "You have: sx_lock,
You want: Slp_mtx" case from no to ok (in r173444).
hmmm
you know, I'm not sure what the correct answer is.. I thought rw locks
were mutex compatible but sx locks were NOT..
Ignore me.. I was reading the table backwards.. of course if you have
an sx you can still take out a mutex, but not visa versa.
An sx lock is considered related to a sleep. (i.e. may be long term)
and as such must not be taken out when holding a mutex, which must
not sleep.
-Ed
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