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Date: Mon, 24 Nov 2008 08:18:47 +0100 From: Stefan Richter <stefanr@...6.in-berlin.de> To: "Rafael J. Wysocki" <rjw@...k.pl> CC: Fabio Comolli <fabio.comolli@...il.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Jay Fenlason <fenlason@...hat.com> Subject: Re: Regression in 2.6.28-rc and 2.6.27-stable - hibernate related Rafael J. Wysocki wrote: > On Sunday, 23 of November 2008, Fabio Comolli wrote: >> Hi. >> >> On Sun, Nov 23, 2008 at 7:24 PM, Fabio Comolli <fabio.comolli@...il.com> wrote: >>> Hi >>> >>> Yes. I started another bisection session between 2.6.27.4 and 2.6.27.5. >>> >> Ok, this time things went much better. The bisection pointed to: >> >> ------------------------------------------------------------------------------------------------------------------------------------------------ >> fcomolli@...king:~/software/GIT-TREES/linux-2.6.27.y> git bisect good >> ff0f8d16839cd02dc95bd92c212cbd5d433a4d2b is first bad commit >> commit ff0f8d16839cd02dc95bd92c212cbd5d433a4d2b >> Author: Jay Fenlason <fenlason@...hat.com> >> Date: Mon Oct 27 23:28:14 2008 +0100 >> >> firewire: fix struct fw_node memory leak >> >> commit 77e557191701afa55ae7320d42ad6458a2ad292e upstream >> >> With the bus_resets patch applied, it is easy to see this memory leak >> by repeatedly resetting the firewire bus while running slabtop in >> another window. Just watch kmalloc-32 grow and grow... >> >> Signed-off-by: Jay Fenlason <fenlason@...hat.com> >> Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de> >> >> :040000 040000 01cadbd5f5fb81ce4f5e2023573204c4fbec3a28 >> 809a53f4be87bd8be133ebd7564e1139a0cfa45b M drivers >> ------------------------------------------------------------------------------------------------------------------------------------------------ >> >> And this is the log: >> >> ------------------------------------------------------------------------------------------------------------------------------------------------ >> fcomolli@...king:~/software/GIT-TREES/linux-2.6.27.y> git bisect log >> git-bisect start >> # good: [056c71459d3acf9fefcb2dc67abeef10e649d508] Linux 2.6.27.4 >> git-bisect good 056c71459d3acf9fefcb2dc67abeef10e649d508 >> # bad: [788a5f3f70e2a9c46020bdd3a195f2a866441c5d] Linux 2.6.27.5 >> git-bisect bad 788a5f3f70e2a9c46020bdd3a195f2a866441c5d >> # bad: [7bdb542c453c14e54af9ebe5c4a827e4a678c47d] powerpc/numa: Make >> memory reserve code more robust >> git-bisect bad 7bdb542c453c14e54af9ebe5c4a827e4a678c47d >> # good: [f29062d0ec12ee3a58c67228dc829574b4ced378] syncookies: fix >> inclusion of tcp options in syn-ack >> git-bisect good f29062d0ec12ee3a58c67228dc829574b4ced378 >> # good: [882491755d4c819de5bb593f04d06692185760aa] firewire: fix >> ioctl() return code >> git-bisect good 882491755d4c819de5bb593f04d06692185760aa >> # bad: [baae4f5fd7a75bdfa70d374b738963053df2bcaa] firewire: fw-sbp2: fix races >> git-bisect bad baae4f5fd7a75bdfa70d374b738963053df2bcaa >> # bad: [ff0f8d16839cd02dc95bd92c212cbd5d433a4d2b] firewire: fix struct >> fw_node memory leak >> git-bisect bad ff0f8d16839cd02dc95bd92c212cbd5d433a4d2b >> # good: [b6021579f54e5b6b31f03fe24de1208a2feb4aec] firewire: Survive >> more than 256 bus resets >> git-bisect good b6021579f54e5b6b31f03fe24de1208a2feb4aec >> ------------------------------------------------------------------------------------------------------------------------------------------------ >> >> The commit reverted cleanly and now I'm running 2.6.27.7 with that >> commit reverted. I'll post my results. >> >> Hoper this helps. Regards, > > Yes, thanks for bisecting this (CCs added). The commit which was pointed to in the bisection does nothing else than free some data in firewire-core. (Note to myself and Jay: See http://lkml.org/lkml/2008/11/23/123 and http://lkml.org/lkml/2008/11/23/153 for the history of this bug.) Fabio, please test a _bad_ kernel with firewire drivers unloaded before hibernation. Also, please enable in the "Kernel hacking" kernel config menu: "Kernel debugging", "Debug slab memory allocations". Thanks, -- Stefan Richter -=====-==--- =-== ==--- http://arcgraph.de/sr/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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