Messages in this thread | | | From | Daniel Phillips <> | Subject | Re: [PATCH] [Request for inclusion] Filesystem in Userspace | Date | Wed, 24 Nov 2004 01:20:40 -0500 |
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Hi Andrew,
On Thursday 18 November 2004 15:57, Andrew Morton wrote: > I've seen one 2.4-based project which had essentially a userspace > blockdevice driver. Marking that special, trusted process PF_MEMALLOC did > indeed fix low-on-memory deadlocks. Obviously it's something one does with > caution, but there are times when it makes sense.
Like the cluster stack, unless we're happy with inhaling all the membership, failover, fencing and etc code into the kernel.
> I think there are codepaths which unconditionally turn off PF_MEMALLOC, so > they need to be tweaked to do a save/set/restore operation for it all to > work.
The only one I spotted is in dm-ioctl.c. We get away with the one in page_alloc.c by branching around it in PF_MEMALLOC mode.
Regards,
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