[lkml]   [2012]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] Ensure that walk_page_range()'s start and end are page-aligned
DR> That's not a precedent, there's a big difference between the
DR> performance of gup_fast(), where we can't spare an additional
DR> compare and branch, and walk_page_range(). VM_BUG_ON() is typically
DR> used in situations where a debug kernel has been built, including
DR> CONFIG_DEBUG_VM, and the check helps to isolate a problem that would
DR> be otherwise difficult to find.

Okay, fair enough. I was trying to stay in line with the other
conventions, knowing that the check would only be done with

I'd rather just make it always do the check in walk_page_range(). Does
that sound reasonable?

Dan Smith
IBM Linux Technology Center

 \ /
  Last update: 2012-02-14 16:03    [W:0.099 / U:0.056 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site