Re: Helding the Kernel lock while doing IO???

From: Stephen C. Tweedie (sct@redhat.com)
Date: Sat May 06 2000 - 06:48:09 EST

Next message: Igmar Palsenberg: "Re: do_execve()."
Previous message: Stephen C. Tweedie: "Re: devfs persistence"
In reply to: Juan J. Quintela: "Helding the Kernel lock while doing IO???"
Next in thread: Andrea Arcangeli: "Re: Helding the Kernel lock while doing IO???"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hi,

On Sat, May 06, 2000 at 03:30:47AM +0200, Juan J. Quintela wrote:
>
> read_swap_cache is called synchronously, then we can have to wait
> until we read the page to liberate the lock kernel. It is intended?
> I am losing some detail?

Holding the big kernel lock while we sleep is quite legal. The
scheduler drops the lock while we sleep and reacquires it when we
are rescheduled. The lock_kernel() lock is not at all like other
spinlocks.

--Stephen

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

Next message: Igmar Palsenberg: "Re: do_execve()."
Previous message: Stephen C. Tweedie: "Re: devfs persistence"
In reply to: Juan J. Quintela: "Helding the Kernel lock while doing IO???"
Next in thread: Andrea Arcangeli: "Re: Helding the Kernel lock while doing IO???"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Sun May 07 2000 - 21:00:19 EST