diff options
author | Michael Buesch <mb@bu3sch.de> | 2007-02-12 03:53:26 -0500 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-12 12:48:35 -0500 |
commit | 053b47ff249b9e0a634dae807f81465205e7c228 (patch) | |
tree | 220695a694f2be08c26a836435e4ba9f093b9af8 /drivers/s390 | |
parent | a871fe858c5437ff8798fbaef52b6a88110b64a1 (diff) |
[PATCH] Workaround CAPI subsystem locking issue
I think the following patch should go into the kernel, until the ISDN/CAPI
guys create the real fix for this issue.
The issue is a concurrency issue with some internal CAPI data structure
which can crash the kernel.
On my FritzCard DSL with the AVM driver it crashes about once a day without
this workaround patch. With this workaround patch it's rock-stable (at
least on UP, but I don't see why this shouldn't work on SMP as well. But
maybe I'm missing something.)
This workaround is kind of a sledgehammer which inserts a global lock to
wrap around all the critical sections. Of course, this is a scalability
issue, if you have many ISDN/CAPI cards. But it prevents a crash. So I
vote for this fix to get merged, until people come up with a better
solution. Better have a stable kernel that's less scalable, than a
crashing and useless kernel.
This bug is in the kernel since 2.6.15 (at least).
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: Kai Germaschewski <kai.germaschewski@gmx.de>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/s390')
0 files changed, 0 insertions, 0 deletions