Messages in this thread | | | Date | Wed, 15 Dec 2004 19:45:56 +0200 | From | Avi Kivity <> | Subject | Re: [PATCH] [Request for inclusion] Filesystem in Userspace |
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Daniel Phillips wrote:
>Hi Avi, > >On Tuesday 30 November 2004 16:37, Avi Kivity wrote: > > >>The situation with userspace filesystems is: >> >> some process allocates memory, blocking on kswapd as memory is full >> kswapd calls userspace filesystem to free memory >> userspace filesystem calls kernel, which allocates memory and blocks >>on kswapd >> eventually all processes in the system block on kswapd >> >>I have observed (and fixed) this on a real system. >> >> > >What was your fix? > > > (with apologies for the long delay)
See the thread at http://lkml.org/lkml/2004/7/26/68. basically allow the userspace filesystem process to access behave like kswapd allocation-wise.
-- Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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