On Sunday, 27 May 2007 18:01, Maximilian Engelhardt wrote:
> On Saturday 26 May 2007, Nigel Cunningham wrote:
> > Hi.
> >
> > On Sat, 2007-05-26 at 14:49 +0200, Maximilian Engelhardt wrote:
> > > On Saturday 26 May 2007, Nigel Cunningham wrote:
> > > > Hi.
> > > >
> > > > On Sat, 2007-05-26 at 11:28 +0200, Maximilian Engelhardt wrote:
> > > > > Hello,
> > > > >
> > > > > When I try software suspend on my laptop it always returns to my
> > > > > running system after some time.
> > > > > This is what's logged by the kernel:
> > > > >
> > > > > swsusp: Basic memory bitmaps created
> > > > > Stopping tasks ...
> > > > > Stopping kernel threads timed out after 20 seconds (1 tasks refusing
> > > > > to freeze):
> > > > > cryptd
> > > > > Restarting tasks ... done.
> > > > > swsusp: Basic memory bitmaps freed
> > > > >
> > > > > I have no idea what's the problem, but if you tell me what I should
> > > > > do I can create debugging information and/or test patches.
> > > >
> > > > Could you try this patch, please? It should help.
> > > >
> > > > Herbert, is this right? If cryptd is going to be used for block devs,
> > > > the task should probably be PF_NOFREEZE (or whatever it is today)
> > > > instead.
> > > >
> > > > Regards,
> > > >
> > > > Nigel
> > > >
> > > > crypto/cryptd.c | 1 +
> > > > include/linux/freezer.h | 3 +++
> > > > kernel/power/process.c | 2 +-
> > > > 3 files changed, 5 insertions(+), 1 deletion(-)
> > > > diff -ruNp 991-fix-cryptd.patch-old/crypto/cryptd.c
> > > > 991-fix-cryptd.patch-new/crypto/cryptd.c ---
> > > > 991-fix-cryptd.patch-old/crypto/cryptd.c 2007-05-19 18:16:47.000000000
> > > > +1000 +++ 991-fix-cryptd.patch-new/crypto/cryptd.c 2007-05-26
> > > > 19:45:42.000000000 +1000 @@ -341,6 +341,7 @@ static int
> > > > cryptd_thread(void *data)
> > > >
> > > > mutex_unlock(&state->mutex);
> > > >
> > > > + try_to_freeze();
> > > > schedule();
> > > > } while (!stop);
> > >
> > > I tried your patch, but when I apply it my kernel doesn't compile any
> > > more. I get these warnings/errors:
> > >
> > > [...]
> > > CC crypto/cryptd.o
> > > crypto/cryptd.c: In function ‘cryptd_thread’:
> > > crypto/cryptd.c:344: warning: implicit declaration of function
> > > ‘try_to_freeze’ [...]
> > > LD init/built-in.o
> > > LD .tmp_vmlinux1
> > > crypto/built-in.o: In function `cryptd_thread':
> > > cryptd.c:(.text+0xd7f5): undefined reference to `try_to_freeze'
> > > make: *** [.tmp_vmlinux1] Error 1
> >
> > Ah. You'll need to add #include <linux/freezer.h> near that start of
> > crypto/cryptd.c. Sorry for forgetting that.
> >
> > Nigel
>
> I added the include line and now I could compile the kernel, but suspending
> still doesn't work.
>
> swsusp: Basic memory bitmaps created
> Stopping tasks ...
> Stopping kernel threads timed out after 20 seconds (1 tasks refusing to
> freeze):
> cryptd
> Restarting tasks ... done.
> swsusp: Basic memory bitmaps freed
OK, this means that cryptd doesn't execute the try_to_freeze() for some
reason.
Please apply the appended patch on top of 2.6.22-rc3 and see if that helps.
Greetings,
Rafael
---
crypto/cryptd.c | 1 +
1 file changed, 1 insertion(+)
Index: linux-2.6.22-rc3/crypto/cryptd.c
===================================================================
--- linux-2.6.22-rc3.orig/crypto/cryptd.c
+++ linux-2.6.22-rc3/crypto/cryptd.c
@@ -316,6 +316,7 @@ static int cryptd_thread(void *data)
struct cryptd_state *state = data;
int stop;
+ current->flags |= PF_NOFREEZE;
do {
struct crypto_async_request *req, *backlog;
-
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