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Date: Thu, 17 Mar 2022 14:38:46 -0400 From: Steven Rostedt <rostedt@...dmis.org> To: Sven Schnelle <svens@...ux.ibm.com> Cc: Ritesh Harjani <riteshh@...ux.ibm.com>, linux-ext4@...r.kernel.org, Jan Kara <jack@...e.cz>, "Theodore Ts'o" <tytso@....edu>, Harshad Shirwadkar <harshadshirwadkar@...il.com>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, stable@...nel.org, hca@...ux.ibm.com Subject: Re: [PATCHv3 02/10] ext4: Fix ext4_fc_stats trace point On Thu, 17 Mar 2022 17:11:42 +0100 Sven Schnelle <svens@...ux.ibm.com> wrote: > Looking at the oops output again made me realizes that the snprintf > tries to write into pages that are mapped RO. Talking to Heiko he > mentioned that s390 maps rodata/text RO when setting up the initial > mapping while x86 has a RW mapping in the beginning and changes that > later to RO. I haven't verified that, but that might be a reason why it > works on x86. > Yes, I discovered this too. I'm currently looking to see how to fix it. -- Steve
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