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(parent: 9fcb663) | patch
um: Memory corruption on startup
authorAnton Ivanov <antivano@cisco.com>
Fri, 7 Mar 2014 18:37:47 +0000 (18:37 +0000)
committerRichard Weinberger <richard@nod.at>
Sun, 20 Apr 2014 21:57:21 +0000 (23:57 +0200)
commit0565103d1adbd765ca45248d04c327c076dd1571
treebc72dc69499b068766284276bee91884afb1218btree | snapshot
parent9fcb663be42e4727c1beabc7c80e2d839199e6b1commit | diff
um: Memory corruption on startup

The reverse case of this race (you must msync before read) is
well known. This is the not so common one.

It can be triggered only on systems which do a lot of task
switching and only at UML startup. If you are starting 200+ UMLs
~ 0.5% will always die without this fix.

Signed-off-by: Anton Ivanov <antivano@cisco.com>
[rw: minor whitespace fixes]
Signed-off-by: Richard Weinberger <richard@nod.at>
arch/um/include/shared/os.h diff | blob | history
arch/um/kernel/physmem.c diff | blob | history
arch/um/os-Linux/file.c diff | blob | history
John Crispins staging tree