On 06/11/2013 12:37 PM, Eric Dumazet wrote:
On Tue, 2013-06-11 at 12:19 -0400, Sasha Levin wrote:
It might be, but you need CAP_SYS_RESOURCE to go into the dangerous
zone (>pipe_max_size).
So if root (or someone with that cap) wants to go there, as Rusty says:
"Root asked, we do."
Yes and no : adding a test to select vmalloc()/vfree() instead of
kmalloc()/kfree() will slow down regular users asking 32 pages in their
pipe.
If there is no _sensible_ use for large pipes even for root, please do
not bloat the code just because we can.
The code to allow root to grow pipes is quite ancient.
Either we drop it or we fix it, leaving it broken as it is is silly.
Thanks,
Sasha
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