Messages in this thread | | | Date | Tue, 27 Feb 2007 11:37:41 +0300 | From | Oleg Nesterov <> | Subject | Re: [RFC][PATCH 1/3] Freezer: Fix vfork problem |
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On 02/27, Aneesh Kumar wrote: > > >+static inline void freezer_do_not_count(void) > >+{ > >+ current->flags |= PF_FREEZER_SKIP; > >+} > >+ > >+/* > >+ * Tell the freezer to count this task as freezeable again and if it's a > >user > >+ * space one, try to freeze it > >+ */ > >+static inline void freezer_count(void) > >+{ > >+ current->flags &= ~PF_FREEZER_SKIP; > >+ if (current->mm) > >+ try_to_freeze(); > >+} > >+ > > > This means that we are not going to wait for the kernel thread > (Parent) to freeze. I guess what vatsa suggested in previous mail is > better.
Not only better, but correct. This is very simple: if we set PF_FREEZER_SKIP, we must call try_to_freeze(), otherwise we confuse the freezer.
Oleg.
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