Re: [PATCH] block/psi: remove PSI annotations from submit_bio

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

 



On Wed, Mar 09, 2022 at 02:18:19PM -0500, Johannes Weiner wrote:
> On Wed, Mar 09, 2022 at 09:43:24AM +0000, cgel.zte@xxxxxxxxx wrote:
> > From: Yang Yang <yang.yang29@xxxxxxxxxx>
> > 
> > psi tracks the time spent submitting the IO of refaulting pages[1].
> > But after we tracks refault stalls from swap_readpage[2][3], there
> > is no need to do so anymore. Since swap_readpage already includes
> > IO submitting time.
> > 
> > [1] commit b8e24a9300b0 ("block: annotate refault stalls from IO submission")
> > [2] commit 937790699be9 ("mm/page_io.c: annotate refault stalls from swap_readpage")
> > [3] commit 2b413a1a728f ("mm: page_io: fix psi memory pressure error on cold swapins")
> > 
> > Signed-off-by: Yang Yang <yang.yang29@xxxxxxxxxx>
> > Reviewed-by: Ran Xiaokai <ran.xiaokai@xxxxxxxxxx>
> 
> It's still needed by file cache refaults!
> 
> NAK
What about submit_bio() only counts file cache refaults?
This will reduce redundant calling of psi_memstall_enter()
for swap_readpage().



[Index of Archives]     [Linux RAID]     [Linux SCSI]     [Linux ATA RAID]     [IDE]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Device Mapper]

  Powered by Linux