https://github.com/torvalds/linux
Revision 1958ff5ad2d4908b44a72bcf564dfe67c981e7fe authored by Maciej Żenczykowski on 08 June 2021, 08:54:38 UTC, committed by Greg Kroah-Hartman on 09 June 2021, 08:34:18 UTC
The reasoning for this change is that if we already had a packet pending, then we also already had a pending timer, and as such there is no need to reschedule it. This also prevents packets getting delayed 60 ms worst case under a tiny packet every 290us transmit load, by keeping the timeout always relative to the first queued up packet. (300us delay * 16KB max aggregation / 80 byte packet =~ 60 ms) As such the first packet is now at most delayed by 300us. Under low transmit load, this will simply result in us sending a shorter aggregate, as originally intended. This patch has the benefit of greatly reducing (by ~10 factor with 1500 byte frames aggregated into 16 kiB) the number of (potentially pretty costly) updates to the hrtimer. Cc: Brooke Basile <brookebasile@gmail.com> Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Cc: Felipe Balbi <balbi@kernel.org> Cc: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: Maciej Żenczykowski <maze@google.com> Link: https://lore.kernel.org/r/20210608085438.813960-1-zenczykowski@gmail.com Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Tip revision: 1958ff5ad2d4908b44a72bcf564dfe67c981e7fe authored by Maciej Żenczykowski on 08 June 2021, 08:54:38 UTC
usb: f_ncm: only first packet of aggregate needs to start timer
usb: f_ncm: only first packet of aggregate needs to start timer
Tip revision: 1958ff5
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arch | ||
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certs | ||
crypto | ||
drivers | ||
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include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
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net | ||
samples | ||
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security | ||
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.clang-format | -rw-r--r-- | 16.4 KB |
.cocciconfig | -rw-r--r-- | 59 bytes |
.get_maintainer.ignore | -rw-r--r-- | 71 bytes |
.gitattributes | -rw-r--r-- | 62 bytes |
.gitignore | -rw-r--r-- | 1.9 KB |
.mailmap | -rw-r--r-- | 19.4 KB |
COPYING | -rw-r--r-- | 496 bytes |
CREDITS | -rw-r--r-- | 98.6 KB |
Kbuild | -rw-r--r-- | 1.3 KB |
Kconfig | -rw-r--r-- | 555 bytes |
MAINTAINERS | -rw-r--r-- | 588.4 KB |
Makefile | -rw-r--r-- | 64.3 KB |
README | -rw-r--r-- | 727 bytes |
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