Re: [PATCH] Avoid calling down_read and down_write during startup

On Thu, Feb 23, 2006 at 05:36:56PM -0500, Alan Stern wrote:
> This patch (as660) changes the registration and unregistration routines 
> for blocking notifier chains.  During system startup, when task switching 
> is illegal, the routines will avoid calling down_write().

Why is that necessary?  The down_write() will immediately succeed as no 
other process can possibly be holding the lock when the system is booting, 
so the special casing doesn't fix anything.

		-ben
-- 
"Ladies and gentlemen, I'm sorry to interrupt, but the police are here 
and they've asked us to stop the party."  Don't Email: <[email protected]>.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [PATCH] Avoid calling down_read and down_write during startup
    • From: Andrew Morton <[email protected]>

• References:
  • Re: [PATCH] Register atomic_notifiers in atomic context
    • From: Andrew Morton <[email protected]>
  • [PATCH] Avoid calling down_read and down_write during startup
    • From: Alan Stern <[email protected]>

• Prev by Date: Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
• Next by Date: Re: NFS Still broken in 2.6.x?
• Previous by thread: [PATCH] Avoid calling down_read and down_write during startup
• Next by thread: Re: [PATCH] Avoid calling down_read and down_write during startup
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]