From: Arnaud Lacombe <lacombar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> To: Justin Piszcz <jpiszcz-BP4nVm5VUdNhbmWW9KSYcQ@public.gmane.org> Cc: Jeff Layton <jlayton-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>, Jesper Juhl <jj-IYz4IdjRLj0sV2N9l4h3zg@public.gmane.org>, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Alan Piszcz <ap-SDpCatL+S6WaMJb+Lgu22Q@public.gmane.org>, Steve French <sfrench-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>, linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: Re: Kernel 3.0: Instant kernel crash when mounting CIFS (also crashes with linux-3.1-rc2 Date: Wed, 17 Aug 2011 17:11:32 -0400 [thread overview] Message-ID: <CACqU3MXWRRGydeb1g80X8+rdSv0i0UFYQVTm0Eq4bsYnbRwf=w@mail.gmail.com> (raw) In-Reply-To: <alpine.DEB.2.02.1108171644050.11234-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> Hi, On Wed, Aug 17, 2011 at 4:45 PM, Justin Piszcz <jpiszcz-BP4nVm5VUdNhbmWW9KSYcQ@public.gmane.org> wrote: > > > On Wed, 17 Aug 2011, Jeff Layton wrote: > >> The crash is happening in the bowels of the slab allocator. >> Specifically, it looks like it's hitting this: >> >> /* >> * The slab was either on partial or free list so >> * there must be at least one object available for >> * allocation. >> */ >> BUG_ON(slabp->inuse >= cachep->num); >> >> ...which looks like maybe the accounting of in-use objects is off. This >> really sounds like some sort of memory corruption. I've not been able >> to reproduce this so far, but I also had someone report panic here that >> might be related: >> >> https://bugzilla.redhat.com/show_bug.cgi?id=731278 >> >> One thing that might be helpful is turning on page poisoning and >> redoing this test, that might make it crash sooner and point out the >> source of the corruption. >> >> Even better would be a bisect to track down the cause... > > > Hi Jeff, > > root@acerlw:/usr/src/linux# grep CONFIG_PAGE_POISONING .config > root@acerlw:/usr/src/linux# ls -l ../linux > lrwxrwxrwx 1 root root 13 Aug 17 14:41 ../linux -> linux-3.1-rc2/ > root@acerlw:/usr/src/linux# > > In what kernel is that feature available, or, how do I enable it? > It is selected by "Kernel hacking" -> "Debug page memory allocations", provided your arch support pagealloc debug. - Arnaud > Justin. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
WARNING: multiple messages have this Message-ID (diff)
From: Arnaud Lacombe <lacombar@gmail.com> To: Justin Piszcz <jpiszcz@lucidpixels.com> Cc: Jeff Layton <jlayton@samba.org>, Jesper Juhl <jj@chaosbits.net>, linux-kernel@vger.kernel.org, Alan Piszcz <ap@solarrain.com>, Steve French <sfrench@samba.org>, linux-cifs@vger.kernel.org Subject: Re: Kernel 3.0: Instant kernel crash when mounting CIFS (also crashes with linux-3.1-rc2 Date: Wed, 17 Aug 2011 17:11:32 -0400 [thread overview] Message-ID: <CACqU3MXWRRGydeb1g80X8+rdSv0i0UFYQVTm0Eq4bsYnbRwf=w@mail.gmail.com> (raw) In-Reply-To: <alpine.DEB.2.02.1108171644050.11234@p34.internal.lan> Hi, On Wed, Aug 17, 2011 at 4:45 PM, Justin Piszcz <jpiszcz@lucidpixels.com> wrote: > > > On Wed, 17 Aug 2011, Jeff Layton wrote: > >> The crash is happening in the bowels of the slab allocator. >> Specifically, it looks like it's hitting this: >> >> /* >> * The slab was either on partial or free list so >> * there must be at least one object available for >> * allocation. >> */ >> BUG_ON(slabp->inuse >= cachep->num); >> >> ...which looks like maybe the accounting of in-use objects is off. This >> really sounds like some sort of memory corruption. I've not been able >> to reproduce this so far, but I also had someone report panic here that >> might be related: >> >> https://bugzilla.redhat.com/show_bug.cgi?id=731278 >> >> One thing that might be helpful is turning on page poisoning and >> redoing this test, that might make it crash sooner and point out the >> source of the corruption. >> >> Even better would be a bisect to track down the cause... > > > Hi Jeff, > > root@acerlw:/usr/src/linux# grep CONFIG_PAGE_POISONING .config > root@acerlw:/usr/src/linux# ls -l ../linux > lrwxrwxrwx 1 root root 13 Aug 17 14:41 ../linux -> linux-3.1-rc2/ > root@acerlw:/usr/src/linux# > > In what kernel is that feature available, or, how do I enable it? > It is selected by "Kernel hacking" -> "Debug page memory allocations", provided your arch support pagealloc debug. - Arnaud > Justin. > > -- > 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 prev parent reply other threads:[~2011-08-17 21:11 UTC|newest] Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-08-15 9:10 Kernel 3.0: Instant kernel crash when mounting CIFS Justin Piszcz [not found] ` <alpine.DEB.2.02.1108150506310.7571-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-15 9:18 ` Jesper Juhl 2011-08-15 9:18 ` Jesper Juhl [not found] ` <alpine.LNX.2.00.1108151117480.19668-h2p7t3/P30RzeRGmFJ5qR7ZzlVVXadcDXqFh9Ls21Oc@public.gmane.org> 2011-08-15 10:47 ` Jeff Layton 2011-08-15 10:47 ` Jeff Layton [not found] ` <20110815064734.403b630f-4QP7MXygkU+dMjc06nkz3ljfA9RmPOcC@public.gmane.org> 2011-08-15 10:54 ` Justin Piszcz 2011-08-15 10:54 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108150653200.7571-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-15 18:01 ` Justin Piszcz 2011-08-15 18:01 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108151357200.32349-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-15 18:09 ` Steve French 2011-08-15 18:09 ` Steve French 2011-08-15 19:31 ` Dave Jones 2011-08-15 19:31 ` Dave Jones 2011-08-17 19:16 ` Kernel 3.0: Instant kernel crash when mounting CIFS (also crashes with linux-3.1-rc2 Justin Piszcz 2011-08-17 19:16 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108171545190.5877@p34.internal.lan> [not found] ` <alpine.DEB.2.02.1108171545190.5877-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-17 19:47 ` Justin Piszcz 2011-08-17 19:47 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108171547110.5877-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-17 20:13 ` Jeff Layton 2011-08-17 20:13 ` Jeff Layton [not found] ` <20110817161349.072e1452-9yPaYZwiELC+kQycOl6kW4xkIHaj4LzF@public.gmane.org> 2011-08-17 20:45 ` Justin Piszcz 2011-08-17 20:45 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108171644050.11234-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-17 21:11 ` Arnaud Lacombe [this message] 2011-08-17 21:11 ` Arnaud Lacombe 2011-08-17 21:53 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108171751570.11234-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-17 22:13 ` Justin Piszcz 2011-08-17 22:13 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108171813460.11234-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-17 22:18 ` Justin Piszcz 2011-08-17 22:18 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108171515050.5877-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-17 23:31 ` Valdis.Kletnieks-PjAqaU27lzQ 2011-08-17 23:31 ` Valdis.Kletnieks 2011-08-18 3:19 ` J. R. Okajima 2011-08-18 3:19 ` J. R. Okajima 2011-08-18 10:35 ` Justin Piszcz 2011-08-18 10:35 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108180632000.10458-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-18 12:14 ` Justin Piszcz 2011-08-18 12:14 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108180807070.7903-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-18 12:22 ` Justin Piszcz 2011-08-18 12:22 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108180821440.7903-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-18 13:11 ` Jeff Layton 2011-08-18 13:11 ` Jeff Layton 2011-08-18 13:15 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108180914180.7903-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-18 17:04 ` Jeff Layton 2011-08-18 17:04 ` Jeff Layton [not found] ` <20110818130408.71c55b96-xSBYVWDuneFaJnirhKH9O4GKTjYczspe@public.gmane.org> 2011-08-18 17:15 ` Steve French 2011-08-18 17:15 ` Steve French 2011-08-18 17:16 ` Justin Piszcz 2011-08-18 17:16 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108181314310.7903-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-18 17:25 ` Steve French 2011-08-18 17:25 ` Steve French [not found] ` <CAH2r5mvNkUWh0rYTbTEWmUPiRsxUbmrGNpTOaebiG0CCKRfA1g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2011-08-18 17:33 ` Justin Piszcz 2011-08-18 17:33 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108181331180.7903-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-18 17:43 ` Steve French 2011-08-18 17:43 ` Steve French [not found] ` <CAH2r5msTpKdxwpgG+-3-gkkr5h7Ox1tL86q3LyTBMd1V8WS7aQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2011-08-18 18:18 ` Justin Piszcz 2011-08-18 18:18 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108181413030.7903-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-18 18:52 ` Jeff Layton 2011-08-18 18:52 ` Jeff Layton [not found] ` <20110818145257.035a38e9-xSBYVWDuneFaJnirhKH9O4GKTjYczspe@public.gmane.org> 2011-08-18 18:54 ` Justin Piszcz 2011-08-18 18:54 ` Justin Piszcz 2011-08-18 19:02 ` Steve French 2011-08-26 21:59 ` Jeff Layton 2011-08-26 21:59 ` Jeff Layton [not found] ` <20110826175940.2830044d-9yPaYZwiELC+kQycOl6kW4xkIHaj4LzF@public.gmane.org> 2011-08-26 22:57 ` Justin Piszcz 2011-08-26 22:57 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108261844170.2203-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-26 23:05 ` Steve French 2011-08-26 23:05 ` Steve French [not found] ` <CAH2r5mtrUq4aTHgqRyG-YZZoUztU4_k4rh+nXrN13CVckex8ZQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2011-08-26 23:16 ` Justin Piszcz 2011-08-26 23:16 ` Justin Piszcz [not found] ` <alpine.DEB.2.02.1108261914250.2203-0qmrozcXWo8bm2hyYBkBBg@public.gmane.org> 2011-08-27 14:31 ` Jeff Layton 2011-08-27 14:31 ` Jeff Layton 2011-08-18 18:33 ` Jeff Layton 2011-08-18 18:33 ` Jeff Layton 2011-08-18 17:36 ` Kong Li 2011-08-18 14:19 ` J. R. Okajima 2011-08-18 14:19 ` J. R. Okajima 2011-08-18 16:01 ` Steve French 2011-08-18 16:01 ` Steve French [not found] ` <CAH2r5mv9cdP_05dzmGZ_mVOswgNGVViU8Y3Z2Su+JT2Jv2TbSA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2011-08-18 16:02 ` Steve French 2011-08-18 16:02 ` Steve French
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