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Date: Wed, 20 Nov 2013 15:06:26 +0200 (EET) From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com> To: Andrey Wagin <avagin@...il.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, Andrew Morton <akpm@...ux-foundation.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org, linux-arch@...r.kernel.org Subject: Re: [PATCH 34/34] mm: dynamically allocate page->ptl if it cannot be embedded to struct page Andrey Wagin wrote: > 2013/11/20 Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>: > > Andrey Wagin wrote: > >> Hi Kirill, > >> > >> Looks like this patch adds memory leaks. > >> [ 116.188310] kmemleak: 15672 new suspected memory leaks (see > >> /sys/kernel/debug/kmemleak) > >> unreferenced object 0xffff8800da45a350 (size 96): > >> comm "dracut-initqueu", pid 93, jiffies 4294671391 (age 362.277s) > >> hex dump (first 32 bytes): > >> 07 00 07 00 ad 4e ad de ff ff ff ff 6b 6b 6b 6b .....N......kkkk > >> ff ff ff ff ff ff ff ff 80 24 b4 82 ff ff ff ff .........$...... > >> backtrace: > >> [<ffffffff817152fe>] kmemleak_alloc+0x5e/0xc0 > >> [<ffffffff811c34f3>] kmem_cache_alloc_trace+0x113/0x290 > >> [<ffffffff811920f7>] __ptlock_alloc+0x27/0x50 > >> [<ffffffff81192849>] __pmd_alloc+0x59/0x170 > >> [<ffffffff81195ffa>] copy_page_range+0x38a/0x3e0 > >> [<ffffffff8105a013>] dup_mm+0x313/0x540 > >> [<ffffffff8105b9da>] copy_process+0x161a/0x1880 > >> [<ffffffff8105c01b>] do_fork+0x8b/0x360 > >> [<ffffffff8105c306>] SyS_clone+0x16/0x20 > >> [<ffffffff81727b79>] stub_clone+0x69/0x90 > >> [<ffffffffffffffff>] 0xffffffffffffffff > >> > >> It's quite serious, because my test host went to panic in a few hours. > > > > Sorry for that. > > > > Could you test patch below. > > Yes, it works. > > I found this too a few minutes ago:) Nice Tested-by ? -- Kirill A. Shutemov -- 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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