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Date: Sun, 19 Jun 2011 21:42:19 -0400 From: Ted Ts'o <tytso@....edu> To: halfdog <me@...fdog.net> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, linux-ext4@...r.kernel.org Subject: Re: Can someone confirm ext4 BUG_ON on latest kernel build? On Sun, Jun 19, 2011 at 10:13:52AM +0000, halfdog wrote: > > Sorry, I do not have latest kernel. Can someone confirm this on latest? > At least bugtracker does not know about it, and to my understanding of > source, should be still here. > > dd if=/dev/zero bs=1M count=64 of=test > mkfs.ext4 -F test > echo -n " " | dd of=test bs=1 count=1 seek=297195 conv=notrunc > mount -o loop test /mnt/test > dmesg -c > > On ubuntu natty with latest kernel, it seems, that > fs/ext4/super.c:__save_error_info calls mod_timer before timer->function > is set at end of fs/ext4/super.c:ext4_fill_super via > sbi->s_err_report.function = print_daily_error_info; > > This causes BUG_ON(!timer->function) in kernel/timer.c:__mod_timer > Device is stuck, not usable any more. This problem is fixed in 2.6.39 (via commit 0449641130f5, which landed in mainline in 2.6.39-rc3). Regards, - Ted -- 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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