Re: [PATCHSET v3.1 0/7] data integrity: Stabilize pages during writeback for various fses

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


Jan Kara <jack@xxxxxxx> writes:

>> Did you already consider, to copy only if page was writeback (like
>> copy-on-write)? I.e. if page is on I/O, copy, then switch the page for
>> writing new data.
>   Yes, that was considered as well. We'd have to essentially migrate the
> page that is under writeback and should be written to. You are going to pay
> the cost of page allocation, copy, increased memory & cache pressure.
> Depending on your backing storage and workload this may or may not be better
> than waiting for IO...

Maybe possible, but you really think on usual case just blocking is
better?

Thanks.
-- 
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [Share Photos]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Photos]     [Yosemite]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

Add to Google Powered by Linux