linux-kernel - Re: tasks getting stuck on mmap

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Message-ID: <AANLkTikhhHroKtC32UxSjFxGhisvjUu9qUygs0FZt9No@mail.gmail.com>
Date:	Tue, 17 Aug 2010 14:26:49 -0700
From:	Tony Luck <tony.luck@...el.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	David Miller <davem@...emloft.net>,
	Michel Lespinasse <walken@...gle.com>,
	David Howells <dhowells@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: tasks getting stuck on mmap_sem?

On Tue, Aug 17, 2010 at 2:08 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>   git repack -adf

$ /usr/bin/time git repack -adf
Counting objects: 125946, done.
Delta compression using up to 32 threads.
Compressing objects: 100% (124132/124132), done.
Writing objects: 100% (125946/125946), done.
Total 125946 (delta 92181), reused 0 (delta 0)
75.80user 5.83system 0:28.59elapsed 285%CPU (0avgtext+0avgdata
12414976maxresident)k
0inputs+0outputs (9major+17615minor)pagefaults 0swaps

Some threading, some page faults, no processes stuck on rwsem things.

Left that command in a while loop ... 10 repeats so far.

-Tony
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