diff options
| author | Davide Libenzi <davidel@xmailserver.org> | 2009-01-29 23:25:26 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-30 03:04:45 +0100 |
| commit | 9df04e1f25effde823a600e755b51475d438f56b (patch) | |
| tree | 57a207adf5e4bfb010000724dc1482e421933be4 /fs/namei.c | |
| parent | hp-wmi: set initial docking state (diff) | |
| download | linux-9df04e1f25effde823a600e755b51475d438f56b.tar.xz linux-9df04e1f25effde823a600e755b51475d438f56b.zip | |
epoll: drop max_user_instances and rely only on max_user_watches
Linus suggested to put limits where the money is, and max_user_watches
already does that w/out the need of max_user_instances. That has the
advantage to mitigate the potential DoS while allowing pretty generous
default behavior.
Allowing top 4% of low memory (per user) to be allocated in epoll watches,
we have:
LOMEM MAX_WATCHES (per user)
512MB ~178000
1GB ~356000
2GB ~712000
A box with 512MB of lomem, will meet some challenge in hitting 180K
watches, socket buffers math teaches us. No more max_user_instances
limits then.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Michael Kerrisk <mtk.manpages@googlemail.com>
Cc: Bron Gondwana <brong@fastmail.fm>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/namei.c')
0 files changed, 0 insertions, 0 deletions