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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2012-03-24 05:29:46 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-05-03 16:52:30 +0200 |
| commit | ed90542b0ce5415050c6fbfca324bccaafa69f2f (patch) | |
| tree | bc8426e780dd399259af2f8ba6e775b613714dc8 /lib/syscall.c | |
| parent | Revert "ath9k_hw: Fix incorrect spur_freq_sd for AR9003" (diff) | |
| download | linux-ed90542b0ce5415050c6fbfca324bccaafa69f2f.tar.xz linux-ed90542b0ce5415050c6fbfca324bccaafa69f2f.zip | |
iwlwifi: fix skb truesize underestimation
By default, iwlwifi uses order-1 pages (8 KB) to store incoming frames,
but doesnt say so in skb->truesize.
This makes very possible to exhaust kernel memory since these skb evade
normal socket memory accounting.
As struct ieee80211_hdr is going to be pulled before calling IP stack,
there is no need to use dev_alloc_skb() to reserve NET_SKB_PAD bytes.
alloc_skb() is ok in this driver, allowing more tailroom.
Pull beginning of frame in skb header, in the hope we can reuse order-1
pages in the driver immediately for small frames and reduce their
truesize to the minimum (linear skbs)
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: Neal Cardwell <ncardwell@google.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'lib/syscall.c')
0 files changed, 0 insertions, 0 deletions