Re: [PATCH] block: add bio_iov_iter_nvecs for figuring out nr_vecs

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

 



On 01/12/2020 13:45, Christoph Hellwig wrote:
> On Tue, Dec 01, 2020 at 01:36:22PM +0000, Pavel Begunkov wrote:
>> Yeah, that's the idea, but also wanted to verify that callers don't
>> free it while in use, or if that's not the case to make it conditional
>> by adding a flag in iov_iter.
>>
>> Can anybody vow right off the bat that all callers behave well?
> 
> Yes, this will need a careful audit, I'm not too sure offhand.  For the
> io_uring case which is sortof the fast path the caller won't free them
> unless we allow the buffer unregistration to race with I/O.

For registered bufs io_uring waits for such requests to complete first,
so it's fine.

-- 
Pavel Begunkov



[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