[lkml]   [2015]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v2 2/2] MIPS: fix kernel lockup or crash after CPU offline/online
On Thu, 15 Jan 2015, Aaro Koskinen wrote:

> As printk() invocation can cause e.g. a TLB miss, printk() cannot be
> called before the exception handlers have been properly initialized.
> This can happen e.g. when netconsole has been loaded as a kernel module
> and the TLB table has been cleared when a CPU was offline.

Hmm, why can a call to `printk' cause a TLB miss, what's so special about
this function? Does it use kernel mapped addresses for any purpose such
as `vmalloc'?


 \ /
  Last update: 2015-01-30 10:41    [W:0.077 / U:4.812 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site