This is follow up to the bug #399904 in Debian. It is now assigned to
libc6, but I think that this would be a bug of GnuPG 1.4.x.
The call sequence in question is:
g10/signal.c:got_fatal_signal
- util/dotlock.c:dotlock_remove_lockfiles
- util/dotlock.c:dotlock_destroy
-
Thanks a lot for the discussion.
James Bottomley wrote:
So your theory is that the data the kernel sees doing the page copy can
be stale because of dirty cache lines in userspace (which is certainly
possible in the ordinary way)?
Yes.
By design that shouldn't happen: the idea behind COW
retitle 561203 threads and fork on machine with VIPT-WB cache
reassign 561203 linux-2.6
thanks
As I am sure that this bug lives in kernel, I do reassign and retitle.
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NIIBE Yutaka wrote:
To have same semantics as other archs, I think that VIPT-WB cache
machine should have cache flush at ptep_set_wrprotect, so that memory
of the page has up-to-date data. Yes, it will be huge performance
impact for fork. But I don't find any good solution other than this
yet
Hi there,
I think that I am catching a bug for threads and fork. I found it
when debugging FTBFS of Gauche, a Scheme interpreter. As I think that
the Debian bug #561203 has same cause, I am CC:-ing to the BTS too.
Please send Cc: to me, I am not on linux-parisc list.
Here, I am talking
Thanks for your quick reply.
James Bottomley wrote:
In COW breaking, the page table entry is copied, so A and B no longer
have page table entries at the same physical location. If the COW is
intact, A and B have the same physical page, but it's also accessed by
the same virtual address,
I am looking the file:
eglibc-2.10.2/ports/sysdeps/unix/sysv/linux/hppa/nptl/sysdep-cancel.h
It doesn't have any cfi directives. I think that it is the cause
of this problem.
When adding cfi directives, it would be good to add nocancel version
of functions.
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Sorry, two more files are needed. Please apply this patch
after applying the patch I send earlier.
GNU C library has successfully (cross) compiled with those header
files.
* include/asm-m32r/{m32r.h,page.h}: New files.
-- NIIBE Yutaka [EMAIL PROTECTED] Tue, 30 Nov 2004 11:50:50 +0900
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