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Add a tuning knob so we can adjust the dirtytime expiration timeout,
which is very useful for testing lazytime.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
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kernel/sysctl.c: In function '__do_proc_dointvec.isra.3':
kernel/sysctl.c:2030:8: warning: 'kbuf' may be used uninitialized in this function [-Wmaybe-uninitialized]
char *tmp = skip_spaces(*buf);
^~~
kernel/sysctl.c:2183:8: note: 'kbuf' was declared here
char *kbuf;
^~~~
kernel/sysctl.c: In function '__do_proc_doulongvec_minmax':
kernel/sysctl.c:2030:8: warning: 'kbuf' may be used uninitialized in this function [-Wmaybe-uninitialized]
char *tmp = skip_spaces(*buf);
^~~
kernel/sysctl.c:2433:8: note: 'kbuf' was declared here
char *kbuf;
^~~~
This will be initialized to NULL normally.
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
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(cherry picked from commit https://lkml.org/lkml/2015/12/21/337)
ASLR only uses as few as 8 bits to generate the random offset for the
mmap base address on 32 bit architectures. This value was chosen to
prevent a poorly chosen value from dividing the address space in such
a way as to prevent large allocations. This may not be an issue on all
platforms. Allow the specification of a minimum number of bits so that
platforms desiring greater ASLR protection may determine where to place
the trade-off.
Bug: 24047224
Signed-off-by: Daniel Cashman <dcashman@android.com>
Signed-off-by: Daniel Cashman <dcashman@google.com>
Change-Id: I66ac01c6f4f2c8dcfc84d1f1e99490b8385b3ed4
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