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

From: Stephen C. Tweedie (sct@redhat.com)
Date: Sat May 06 2000 - 07:48:09 EDT

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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

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