Messages in this thread | | | Date | Sun, 14 Apr 2013 09:25:54 +0200 | From | Marco Stornelli <> | Subject | Re: Return value of __mm_populate |
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Hi,
Il 14/04/2013 02:18, KOSAKI Motohiro ha scritto: > (4/13/13 5:14 AM), Marco Stornelli wrote: >> Hi, >> >> I was seeing the code of __mm_populate (in -next) and I've got a doubt >> about the return value. The function __mlock_posix_error_return should >> return a proper error for mlock, converting the return value from >> __get_user_pages. It checks for EFAULT and ENOMEM. Actually >> __get_user_pages could return, in addition, ERESTARTSYS and EHWPOISON. > > __get_user_pages doesn't return EHWPOISON if FOLL_HWPOISON is not specified. > I'm not expert ERESTARTSYS. I understand correctly, ERESTARTSYS is only returned > when signal received, and signal handling routine (e.g. do_signal) modify EIP and > hidden ERESTARTSYS from userland generically. >
Yep, you're right, the "magic" is inside the signal management. Thanks!!
Marco
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