| commit | be61510387ff29c49603545a6db006932af97b2a | |
| author | Helge Deller <deller@gmx.de> | |
| Tue, 16 Jun 2009 20:51:48 +0000 (16 20:51 +0000) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Thu, 30 Jul 2009 21:40:07 +0000 (30 14:40 -0700) | ||
| tree | 17f188abd4e6252ebfcd27ba9985708a8b7210b2 | treesnapshot (tar.gz zip) |
| parent | 7cbf1b4881c935200d760bc6184131a114fada12 | commitdiff |
parisc: ensure broadcast tlb purge runs single threaded
commit e82a3b75127188f20c7780bec580e148beb29da7 upstream.
The TLB flushing functions on hppa, which causes PxTLB broadcasts on the system
bus, needs to be protected by irq-safe spinlocks to avoid irq handlers to deadlock
the kernel. The deadlocks only happened during I/O intensive loads and triggered
pretty seldom, which is why this bug went so long unnoticed.
Signed-off-by: Helge Deller <deller@gmx.de>
[edited to use spin_lock_irqsave on UP as well since we'd been locking there
all this time anyway, --kyle]
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
commit e82a3b75127188f20c7780bec580e148beb29da7 upstream.
The TLB flushing functions on hppa, which causes PxTLB broadcasts on the system
bus, needs to be protected by irq-safe spinlocks to avoid irq handlers to deadlock
the kernel. The deadlocks only happened during I/O intensive loads and triggered
pretty seldom, which is why this bug went so long unnoticed.
Signed-off-by: Helge Deller <deller@gmx.de>
[edited to use spin_lock_irqsave on UP as well since we'd been locking there
all this time anyway, --kyle]
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| arch/parisc/include/asm/tlbflush.h | diffblobblamehistory | |
| arch/parisc/kernel/cache.c | diffblobblamehistory | |
| arch/parisc/kernel/pci-dma.c | diffblobblamehistory |