Revision dd12f48d4e8774415b528d3991ae47c28f26e1ac authored by Bhavesh P. Davda on 17 August 2005, 18:26:33 UTC, committed by Linus Torvalds on 17 August 2005, 19:52:04 UTC
This bug is quite subtle and only happens in a very interesting situation where a real-time threaded process is in the middle of a coredump when someone whacks it with a SIGKILL. However, this deadlock leaves the system pretty hosed and you have to reboot to recover. Not good for real-time priority-preemption applications like our telephony application, with 90+ real-time (SCHED_FIFO and SCHED_RR) processes, many of them multi-threaded, interacting with each other for high volume call processing. Acked-by: Roland McGrath <roland@redhat.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1 parent ade6648
cachectl.h
/*
* cachectl.h -- defines for M32R cache control system calls
*
* Copyright (C) 2003 by Kazuhiro Inaoka
*/
#ifndef __ASM_M32R_CACHECTL
#define __ASM_M32R_CACHECTL
/*
* Options for cacheflush system call
*
* cacheflush() is currently fluch_cache_all().
*/
#define ICACHE (1<<0) /* flush instruction cache */
#define DCACHE (1<<1) /* writeback and flush data cache */
#define BCACHE (ICACHE|DCACHE) /* flush both caches */
/*
* Caching modes for the cachectl(2) call
*
* cachectl(2) is currently not supported and returns ENOSYS.
*/
#define CACHEABLE 0 /* make pages cacheable */
#define UNCACHEABLE 1 /* make pages uncacheable */
#endif /* __ASM_M32R_CACHECTL */
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