Messages in this thread | | | Subject | Re: [PATCH] [Request for inclusion] Filesystem in Userspace | From | David Woodhouse <> | Date | Tue, 16 Nov 2004 10:17:51 +0000 |
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On Tue, 2004-11-16 at 10:52 +0100, Miklos Szeredi wrote: > > yes but how do you know the entry is still on the list and valid ? > > Because, it's always kept on one of two lists: pending and processing. > The entry is valid valid because it's "owned" by the caller, it's > never freed inside request_send(). > > > you dropped the lock. A normal code pattern is that you then HAVE > > to revalidate the assumptions which you guard by that lock. > > The lock guards the list not the list element which is being removed.
Locking rules like that need to be clearly documented.
-- dwmw2
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