Re: Andrea VM changes

From: Marcelo Tosatti (marcelo_at_parcelfarce.linux.theplanet.co.uk)
Date: 08/31/03

  • Next message: Adrian Bunk: "Re: make: *** [menuconfig] Error 1" 
    Date:	Sun, 31 Aug 2003 14:34:01 -0300 (BRT)
To: Andrea Arcangeli <andrea@suse.de>

    ---------- Forwarded message ----------
    Date: Sun, 31 Aug 2003 12:43:27 -0300 (BRT)
    From: Marcelo Tosatti <marcelo@parcelfarce.linux.theplanet.co.uk>
    To: Andrea Arcangeli <andrea@suse.de>
    Cc: Marcelo Tosatti <marcelo@conectiva.com.br>,
         Mike Fedyk <mfedyk@matchmail.com>, Antonio Vargas <wind@cocodriloo.com>,
         lkml <linux-kernel@vger.kernel.org>,
         Marc-Christian Petersen <m.c.p@wolk-project.de>
    Subject: Re: Andrea VM changes

    On Sun, 31 Aug 2003, Andrea Arcangeli wrote:

    > This oom killer on desktops may do a worse selections of the task to
    > kill (the usual ssh now has a chance to be killed), but it fixes the oom
    > deadlocks and it won't do stupid things on servers shall a netscape or
    > whatever else app hit an userspace bug. So I've to prefer it, until I
    > will write a reliable algorithm for the oom killing that won't fall into
    > dosable corner cases so easily (mlock/nfs/database as the three most
    > common examples of where current mainline can fail, btw the lowmem
    > shortage is another very common DoS that the oom killer will never
    > notice, my tree doesn't deadlock [or at least not technically, in
    > practice it may look like a kernel deadlock despite syscalls returns
    > -ENOMEM ;) ] during lowmem shortage on the 64G boxes).

    Suppose you have a big fat hog leaking (lets say, netscape) allocating
    pages at a slow pace. Now you have a decent well behaved app who is
    allocating at a fast pace, and gets killed.

    The chance the well behaved app gets killed is big, right?

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

  • Next message: Adrian Bunk: "Re: make: *** [menuconfig] Error 1"

    Relevant Pages