| commit | e82a3b75127188f20c7780bec580e148beb29da7 | |
| author | Helge Deller <deller@gmx.de> | |
| Tue, 16 Jun 2009 20:51:48 +0000 (16 20:51 +0000) | ||
| committer | Kyle McMartin <kyle@mcmartin.ca> | |
| Fri, 3 Jul 2009 03:34:09 +0000 (3 03:34 +0000) | ||
| tree | 8a11d55123c20b5341a95941c77eb3d35e4ef9d8 | treesnapshot (tar.gz zip) |
| parent | 84be31be3727d11b2a91781306b642e801c5a379 | commitdiff |
parisc: ensure broadcast tlb purge runs single threaded
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>
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>
| arch/parisc/include/asm/tlbflush.h | diffblobblamehistory | |
| arch/parisc/kernel/cache.c | diffblobblamehistory | |
| arch/parisc/kernel/pci-dma.c | diffblobblamehistory |