Re: Do we need to unrevert "fs: do not prefault sys_write() user buffer pages"?

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

 



Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

> End result: doing the fault_in_readable "unnecessarily" at the
> beginning is likely the better optimization. It's basically free when
> it's not necessary, and it avoids an extra fault (and extra
> lock/unlock and retry) when it does end up faulting pages in.

It may also cause the read in to happen in the background whilst write_begin
is being done.

David




[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