Re: Update of file offset on write() etc. is non-atomic with I/O

[Cedric Blancher]

On 4 March 2014 00:39, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
> On Mon, Mar 03, 2014 at 03:23:55PM -0800, Linus Torvalds wrote:
>
>> This just uses a "flags" field, and we currently only have two bits
>> that we use: FDPUT_FPUT and FDPUT_POS_UNLOCK. The first patch knows
>> that "fget_light()" writes 0/1 for that, which is the same as the
>> FDPUT_FPUT bit. I didn't bother to comment on it or clean it up, since
>> the second patch just removes that whole fget_light() mess.
>>
>> Comments?
>
> do_sendfile() is also there and this one is even more unpleasant ;-/
> We probably can ignore that one (until POSIX learns of its existence),
> thouhg...

I've forwarded your request to the Austin Group (who manage the POSIX stuff).

Ced
-- 
Cedric Blancher <cedric.blancher@xxxxxxxxx>
Institute Pasteur
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