Re: [PATCH 0/4] fsfreeze: from uninterruptible to killable waiting

[Al Viro <viro@ZenIV.linux.org.uk>]

On Sat, Apr 06, 2013 at 12:03:00PM +0200, Marco Stornelli wrote:
> Hi all,
> 
> with this patch series we try to change the fs freeze behavior in order
> to sleep in a killable state instead of sleeping in uninterruptible 
> state. The patches are *NOT* tested because but a first review is welcome.
> The design is simply:
> 
> 1) Internal fs operations are not changed from fsfreeze point of view, 
> sb_start_intwrite is not changed;
> 
> 2) sb_start_write and sb_start_pagefault now return a proper error code 
> if the process receive SIGKILL and all the functions must manage this 
> error and return EINTR or VM_FAULT_RETRY.

sb_start_write() is done _way_ too deep in the call chain in the mainline;
check the changes in -next, please.