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fcf9a0ef8d
ksm thread unconditionally sleeps in ksm_scan_thread() after each iteration: schedule_timeout_interruptible( msecs_to_jiffies(ksm_thread_sleep_millisecs)) The timeout is configured in /sys/kernel/mm/ksm/sleep_millisecs. In case of user writes a big value by a mistake, and the thread enters into schedule_timeout_interruptible(), it's not possible to cancel the sleep by writing a new smaler value; the thread is just sleeping till timeout expires. The patch fixes the problem by waking the thread each time after the value is updated. This also may be useful for debug purposes; and also for userspace daemons, which change sleep_millisecs value in dependence of system load. Link: http://lkml.kernel.org/r/154454107680.3258.3558002210423531566.stgit@localhost.localdomain Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Acked-by: Cyrill Gorcunov <gorcunov@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.