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Re: [PATCH 06/11] rwsem: wake queued readers when writer blocks on active read lock

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From: Tony Luck
Subject: Re: [PATCH 06/11] rwsem: wake queued readers when writer blocks on active read lock
Date: Friday, August 13, 2010 - 2:19 pm

On Fri, Aug 13, 2010 at 9:09 AM, Tony Luck <tony.luck@intel.com> wrote:

My hung process is "make" (GNU Make 3.81). Stuck forever here:

SYSCALL_DEFINE1(brk, unsigned long, brk)
{
        unsigned long rlim, retval;
        unsigned long newbrk, oldbrk;
        struct mm_struct *mm = current->mm;
        unsigned long min_brk;

        down_write(&mm->mmap_sem);  <<<<<<<<<<<<<<<

Is make multi-threaded these days? If not, I'm confused about how anything
complicated could have happened on mmap_sem.

-Tony
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Messages in current thread:
[PATCH 06/11] rwsem: wake queued readers when writer block ..., Michel Lespinasse, (Mon May 24, 1:31 pm)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Tony Luck, (Wed Aug 11, 6:24 pm)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Michel Lespinasse, (Wed Aug 11, 10:02 pm)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Michel Lespinasse, (Wed Aug 11, 10:09 pm)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Linus Torvalds, (Thu Aug 12, 8:57 am)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Tony Luck, (Thu Aug 12, 9:22 am)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Tony Luck, (Thu Aug 12, 9:24 am)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Tony Luck, (Thu Aug 12, 3:23 pm)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Tony Luck, (Fri Aug 13, 9:09 am)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Tony Luck, (Fri Aug 13, 2:19 pm)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Tony Luck, (Fri Aug 13, 4:38 pm)
Re: [PATCH 06/11] rwsem: wake queued readers when writer b ..., Michel Lespinasse, (Fri Aug 13, 4:48 pm)