Re: [RFC PATCH 12/13] fs/userfaultfd: kmem-cache for wait-queue objects

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

 



> On Nov 28, 2020, at 4:45 PM, Nadav Amit <nadav.amit@xxxxxxxxx> wrote:
> 
> From: Nadav Amit <namit@xxxxxxxxxx>
> 
> Allocating work-queue objects on the stack has usually negative
> performance side-effects. First, it is hard to ensure alignment to
> cache-lines without increasing the stack size. Second, it might cause
> false sharing. Third, it is more likely to encounter TLB misses as
> objects are more likely reside on different pages.
> 
> Allocate userfaultfd wait-queue objects on the heap using kmem-cache for
> better performance.

Err… The wait-queue objects are still on the stack in some cases that I
missed. Will fix.



[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