Anton Ivanov d5e3f5cbe5 um: Prevent IRQ handler reentrancy ...

The existing IRQ handler design in UML does not prevent reentrancy

This is mitigated by fd-enable/fd-disable semantics for the IO
portion of the UML subsystem. The timer, however, can and is
re-entered resulting in very deep stack usage and occasional
stack exhaustion.

This patch prevents this by checking if there is a timer
interrupt in-flight before processing any pending timer interrupts.

Signed-off-by: Anton Ivanov <aivanov@brocade.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

2016-01-10 21:49:47 +01:00

..

drivers

Merge branch 'for-linus-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

2015-06-28 13:55:08 -07:00

skas

um: Switch clocksource to hrtimers

2015-11-06 22:54:49 +01:00

aio.c

um: Cleanup SIGTERM handling

2013-09-07 10:56:58 +02:00

elf_aux.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

execvp.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

file.c

um: Include sys/types.h for makedev(), major(), minor()

2015-06-25 22:42:21 +02:00

helper.c

um: Fix waitpid() usage in helper code

2015-10-19 22:53:37 +02:00

irq.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

main.c

um: Switch clocksource to hrtimers

2015-11-06 22:54:49 +01:00

Makefile

um: use the right ifdef around exports in user_syms.c

2012-03-25 00:29:55 +01:00

mem.c

uml: Simplify tempdir logic.

2014-04-20 23:10:44 +02:00

process.c

um: Switch clocksource to hrtimers

2015-11-06 22:54:49 +01:00

registers.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

sigio.c

um: Cleanup SIGTERM handling

2013-09-07 10:56:58 +02:00

signal.c

um: Prevent IRQ handler reentrancy

2016-01-10 21:49:47 +01:00

start_up.c

uml: flush stdout before forking

2016-01-10 21:49:47 +01:00

time.c

um: Switch clocksource to hrtimers

2015-11-06 22:54:49 +01:00

tty.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

umid.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

user_syms.c

um: get rid of pointless include "..." where include <...> will do

2012-10-09 22:28:45 +02:00

util.c

um: Cleanup SIGTERM handling

2013-09-07 10:56:58 +02:00