Re: [PATCH 0/2] kernel BUG at mm/huge_memory.c:212!
On Wed, Dec 12, 2012 at 01:36:36PM +0800, Bob Liu wrote: > On Mon, Dec 3, 2012 at 9:02 PM, Jiri Slaby wrote: > > On 11/30/2012 04:03 PM, Kirill A. Shutemov wrote: > >> From: "Kirill A. Shutemov" > >> > >> Hi Jiri, > >> > >> Sorry for late answer. It took time to reproduce and debug the issue. > >> > >> Could you test two patches below by thread. I expect it to fix both > >> issues: put_huge_zero_page() and Bad rss-counter state. > > > > Hi, yes, since applying the patches on the last Thu, it didn't recur. > > > >> Kirill A. Shutemov (2): > >> thp: fix anononymous page accounting in fallback path for COW of HZP > >> thp: avoid race on multiple parallel page faults to the same page > >> > >> mm/huge_memory.c | 30 +- > >> 1 file changed, 25 insertions(+), 5 deletions(-) > > > > I still saw this bug on 3.7.0-rc8, but it's hard to reproduce it. > It appears only once. I guess the patch you've posted fixes the issue, right? It's useful to enable debug_cow to test fallback path: echo 1 > /sys/kernel/mm/transparent_hugepage/debug_cow -- Kirill A. Shutemov signature.asc Description: Digital signature
Re: [PATCH 0/2] kernel BUG at mm/huge_memory.c:212!
On Wed, Dec 12, 2012 at 01:36:36PM +0800, Bob Liu wrote: On Mon, Dec 3, 2012 at 9:02 PM, Jiri Slaby jsl...@suse.cz wrote: On 11/30/2012 04:03 PM, Kirill A. Shutemov wrote: From: Kirill A. Shutemov kirill.shute...@linux.intel.com Hi Jiri, Sorry for late answer. It took time to reproduce and debug the issue. Could you test two patches below by thread. I expect it to fix both issues: put_huge_zero_page() and Bad rss-counter state. Hi, yes, since applying the patches on the last Thu, it didn't recur. Kirill A. Shutemov (2): thp: fix anononymous page accounting in fallback path for COW of HZP thp: avoid race on multiple parallel page faults to the same page mm/huge_memory.c | 30 +- 1 file changed, 25 insertions(+), 5 deletions(-) I still saw this bug on 3.7.0-rc8, but it's hard to reproduce it. It appears only once. I guess the patch you've posted fixes the issue, right? It's useful to enable debug_cow to test fallback path: echo 1 /sys/kernel/mm/transparent_hugepage/debug_cow -- Kirill A. Shutemov signature.asc Description: Digital signature
Re: [PATCH 0/2] kernel BUG at mm/huge_memory.c:212!
On Mon, Dec 3, 2012 at 9:02 PM, Jiri Slaby wrote: > On 11/30/2012 04:03 PM, Kirill A. Shutemov wrote: >> From: "Kirill A. Shutemov" >> >> Hi Jiri, >> >> Sorry for late answer. It took time to reproduce and debug the issue. >> >> Could you test two patches below by thread. I expect it to fix both >> issues: put_huge_zero_page() and Bad rss-counter state. > > Hi, yes, since applying the patches on the last Thu, it didn't recur. > >> Kirill A. Shutemov (2): >> thp: fix anononymous page accounting in fallback path for COW of HZP >> thp: avoid race on multiple parallel page faults to the same page >> >> mm/huge_memory.c | 30 +- >> 1 file changed, 25 insertions(+), 5 deletions(-) > I still saw this bug on 3.7.0-rc8, but it's hard to reproduce it. It appears only once. -- Regards, --Bob -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 0/2] kernel BUG at mm/huge_memory.c:212!
On Mon, Dec 3, 2012 at 9:02 PM, Jiri Slaby jsl...@suse.cz wrote: On 11/30/2012 04:03 PM, Kirill A. Shutemov wrote: From: Kirill A. Shutemov kirill.shute...@linux.intel.com Hi Jiri, Sorry for late answer. It took time to reproduce and debug the issue. Could you test two patches below by thread. I expect it to fix both issues: put_huge_zero_page() and Bad rss-counter state. Hi, yes, since applying the patches on the last Thu, it didn't recur. Kirill A. Shutemov (2): thp: fix anononymous page accounting in fallback path for COW of HZP thp: avoid race on multiple parallel page faults to the same page mm/huge_memory.c | 30 +- 1 file changed, 25 insertions(+), 5 deletions(-) I still saw this bug on 3.7.0-rc8, but it's hard to reproduce it. It appears only once. -- Regards, --Bob -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 0/2] kernel BUG at mm/huge_memory.c:212!
On 11/30/2012 04:03 PM, Kirill A. Shutemov wrote: > From: "Kirill A. Shutemov" > > Hi Jiri, > > Sorry for late answer. It took time to reproduce and debug the issue. > > Could you test two patches below by thread. I expect it to fix both > issues: put_huge_zero_page() and Bad rss-counter state. Hi, yes, since applying the patches on the last Thu, it didn't recur. > Kirill A. Shutemov (2): > thp: fix anononymous page accounting in fallback path for COW of HZP > thp: avoid race on multiple parallel page faults to the same page > > mm/huge_memory.c | 30 +- > 1 file changed, 25 insertions(+), 5 deletions(-) thanks, -- js suse labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 0/2] kernel BUG at mm/huge_memory.c:212!
On 11/30/2012 04:03 PM, Kirill A. Shutemov wrote: From: Kirill A. Shutemov kirill.shute...@linux.intel.com Hi Jiri, Sorry for late answer. It took time to reproduce and debug the issue. Could you test two patches below by thread. I expect it to fix both issues: put_huge_zero_page() and Bad rss-counter state. Hi, yes, since applying the patches on the last Thu, it didn't recur. Kirill A. Shutemov (2): thp: fix anononymous page accounting in fallback path for COW of HZP thp: avoid race on multiple parallel page faults to the same page mm/huge_memory.c | 30 +- 1 file changed, 25 insertions(+), 5 deletions(-) thanks, -- js suse labs -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 0/2] kernel BUG at mm/huge_memory.c:212!
From: "Kirill A. Shutemov" Hi Jiri, Sorry for late answer. It took time to reproduce and debug the issue. Could you test two patches below by thread. I expect it to fix both issues: put_huge_zero_page() and Bad rss-counter state. Kirill A. Shutemov (2): thp: fix anononymous page accounting in fallback path for COW of HZP thp: avoid race on multiple parallel page faults to the same page mm/huge_memory.c | 30 +- 1 file changed, 25 insertions(+), 5 deletions(-) -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 0/2] kernel BUG at mm/huge_memory.c:212!
From: Kirill A. Shutemov kirill.shute...@linux.intel.com Hi Jiri, Sorry for late answer. It took time to reproduce and debug the issue. Could you test two patches below by thread. I expect it to fix both issues: put_huge_zero_page() and Bad rss-counter state. Kirill A. Shutemov (2): thp: fix anononymous page accounting in fallback path for COW of HZP thp: avoid race on multiple parallel page faults to the same page mm/huge_memory.c | 30 +- 1 file changed, 25 insertions(+), 5 deletions(-) -- 1.7.11.7 -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
