Re: [patch 1/2] getattr - fill the size of pipes

> Cute feature, but it is (I assume) a Linux-specific extension and is
> something which we'll need to maintain for ever and it invites

Actually it used to work on the old old Linux pipe code.

> unportability to older Linuxes and other OSes and it introduces some risk
> of breakage of existing applications.  And it slows down fstat on a pipe.

Most Sys5 based boxes happen to put the right value there but not
everyone and its not guaranteed in the slightest
> 
> Given that the info can already be obtained via ioctl(FIONREAD) anyway, I
> don't think that (gain > pain)?

Nor me - any application trying to reduce the syscall count would just do
a very large read and get the data and size in one go.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • [patch 1/2] getattr - fill the size of pipes
    • From: Jan Engelhardt <[email protected]>
  • Re: [patch 1/2] getattr - fill the size of pipes
    • From: Andrew Morton <[email protected]>

• Prev by Date: Re: [PATCH 2/3] Prepare pid_nr() etc functions to work with not-NULL pids
• Next by Date: RE: SLUB performance regression vs SLAB
• Previous by thread: Re: [patch 1/2] getattr - fill the size of pipes
• Next by thread: [PATCH] isofs: add +w bit for non-RR discs
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]