Re: [patch] O(1) scheduler, -H5

From: Russell King (rmk@arm.linux.org.uk)
Date: Fri Jan 11 2002 - 06:31:31 EST


On Fri, Jan 11, 2002 at 01:38:51AM +0100, Ingo Molnar wrote:
> it adds code to catch places that call schedule() from global-cli()
> sections. Right now release_kernel_lock() doesnt automatically release the
> IRQ lock if there is no kernel lock held. A fair amount of code does this
> still, and i think we should fix them in 2.5.

The serial driver (old or new) open/close functions are one of the worst
offenders of the global-cli-and-hold-kernel-lock-and-schedule problem.
I'm currently working on fixing this in the new serial driver.

-- 
Russell King (rmk@arm.linux.org.uk)                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html

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



This archive was generated by hypermail 2b29 : Tue Jan 15 2002 - 21:00:34 EST