[lkml]   [2017]   [Dec]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] NFS: allow name_to_handle_at() to work for Amazon EFS.
On Thu, Dec 07, 2017 at 02:20:05PM +1100, NeilBrown wrote:
> We can allocate in fs/notify/fdinfo.c:show_fdinfo() which is
> the earliest 'notify' specific code to run. There is no
> opportunity to return an error but GFP_KERNEL allocations under 1 page
> never fail..


* The default allocator behavior depends on the request size. We have a concept
* of so called costly allocations (with order > PAGE_ALLOC_COSTLY_ORDER).
* !costly allocations are too essential to fail so they are implicitly
* non-failing by default (with some exceptions like OOM victims might fail so
* the caller still has to check for failures) while costly requests try to be
* not disruptive and back off even without invoking the OOM killer.
* The following three modifiers might be used to override some of these
* implicit rules

 \ /
  Last update: 2017-12-07 06:35    [W:0.071 / U:3.532 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site