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Date: Thu, 4 Jun 2020 09:37:45 +0300 From: Mike Rapoport <rppt@...nel.org> To: Ira Weiny <ira.weiny@...el.com> Cc: Guenter Roeck <linux@...ck-us.net>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>, Helge Deller <deller@....de>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>, "David S. Miller" <davem@...emloft.net>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, Dave Hansen <dave.hansen@...ux.intel.com>, Andy Lutomirski <luto@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Chris Zankel <chris@...kel.net>, Max Filippov <jcmvbkbc@...il.com>, Dan Williams <dan.j.williams@...el.com>, linux-snps-arc@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org, linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org, linux-xtensa@...ux-xtensa.org, dri-devel@...ts.freedesktop.org, Christian Koenig <christian.koenig@....com>, Al Viro <viro@...iv.linux.org.uk>, Christoph Hellwig <hch@....de> Subject: Re: [PATCH] arch/{mips,sparc,microblaze,powerpc}: Don't enable pagefault/preempt twice On Wed, Jun 03, 2020 at 11:22:26PM -0700, Ira Weiny wrote: > On Wed, Jun 03, 2020 at 04:44:17PM -0700, Guenter Roeck wrote: > > With linux-next on sparc I too see the spinlock issue; something like: > > ... > Starting syslogd: BUG: spinlock recursion on CPU#0, S01syslogd/139 > lock: 0xf53ef350, .magic: dead4ead, .owner: S01syslogd/139, .owner_cpu: 0 > CPU: 0 PID: 139 Comm: S01syslogd Not tainted 5.7.0-next-20200603 #1 > [f0067d00 : > do_raw_spin_lock+0xa8/0xd8 ] > [f00d598c : > copy_page_range+0x328/0x804 ] > [f0025c34 : > dup_mm+0x334/0x434 ] > [f0027198 : > copy_process+0x1248/0x12d4 ] > [f00273b8 : > _do_fork+0x54/0x30c ] > [f00276e4 : > do_fork+0x5c/0x6c ] > [f000de44 : > sparc_do_fork+0x18/0x38 ] > [f000b7f4 : > do_syscall+0x34/0x40 ] > [5010cd4c : > 0x5010cd4c ] > > > I'm going to bisect between there and HEAD. The sparc issue should be fixed by https://lore.kernel.org/lkml/20200526173302.377-1-will@kernel.org > Ira -- Sincerely yours, Mike.
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