Re: [PATCH v4 1/1] mm: introduce put_user_page*(), placeholder versions

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


On Wed, Mar 20, 2019 at 08:55:17AM -0600, William Kucharski wrote:
> > On Mar 19, 2019, at 10:33 PM, Jerome Glisse <jglisse@xxxxxxxxxx> wrote:
> > 
> > So i believe best we could do is send a SIGBUS to the process that has
> > GUPed a range of a file that is being truncated this would match what
> > we do for CPU acces. There is no reason access through GUP should be
> > handled any differently.
> This should be done lazily, as there's no need to send the SIGBUS unless
> the GUPed page is actually accessed post-truncate.

Issue is that unlike CPU access we might not be able to detect device
access and thus it is not something we can do lazily for everyone.


[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]

  Powered by Linux