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Date: Wed, 1 Nov 2017 16:32:04 +0100 From: Petr Mladek <pmladek@...e.com> To: Miroslav Benes <mbenes@...e.cz> Cc: jpoimboe@...hat.com, jeyu@...nel.org, jikos@...nel.org, lpechacek@...e.cz, pavel@....cz, live-patching@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3 2/2] livepatch: force transition process to finish On Tue 2017-10-31 12:48:53, Miroslav Benes wrote: > If a task sleeps in a set of patched functions uninterruptedly, it could > block the whole transition process indefinitely. Thus it may be useful > to clear its TIF_PATCH_PENDING to allow the process to finish. > > Admin can do that now by writing to force sysfs attribute in livepatch > sysfs directory. TIF_PATCH_PENDING is then cleared for all tasks and the > transition can finish successfully. > > Important note! Use wisely. Admin must be sure that it is safe to > execute such action. This means that it must be checked that by doing so > the consistency model guarantees are not violated. > > Signed-off-by: Miroslav Benes <mbenes@...e.cz> If no animals were harmed when developing this brute force then feel free to use: Reviewed-by: Petr Mladek <pmladek@...e.com> Best Regards, Petr
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