mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-07 19:30:30 +09:00
789095fa46
Doing tx_clean() inside poll() may scramble the tx ring buffer if tx() is running. This will cause tx to stop working, which can be reproduced by simultaneously downloading two large files at high speed. Moving tx_clean() into tx() will prevent this. And tx interrupt is no longer needed now. Picked the Shuyu's patch up, the patch is sent on https://patchwork.kernel.org/patch/8356821/, since that make sense for rockchip platform. Note: Many people feedback the cransh problems with rk3036/rk3188 emac when download the heavy loading and this patch is indeed can fix the crash. The crash log as the followings: ... [ 2191.996127 ] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.0-rc6 #114 [ 2192.002475 ] Hardware name: Rockchip (Device Tree) [ 2192.007174 ] Backtrace: [ 2192.009658 ] [<c00134d4>] (dump_backtrace) from [<c0013680>] (show_stack+0x18/0x1c) [ 2192.017220 ] r7:c051c4f8 r6:ef463180 r5:c05b7000 r4:00000000 [ 2192.022948 ] [<c0013668>] (show_stack) from [<c0219d90>] (dump_stack+0x90/0xa0) [ 2192.030176 ] [<c0219d00>] (dump_stack) from [<c00b2cd4>] (bad_page+0xdc/0x12c) [ 2192.037302 ] r5:c059a100 r4:c05f430c [ 2192.040913 ] [<c00b2bf8>] (bad_page) from [<c00b606c>] (get_page_from_freelist+0x388/0x95c) [ 2192.049166 ] r9:00000008 r8:ef463180 r7:c051c4d0 r6:00000000 r5:00000000 r4:c051c4e4 [ 2192.056982 ] [<c00b5ce4>] (get_page_from_freelist) from [<c00b6880>] (__alloc_pages_nodemask+0xd8/0x8e8) [ 2192.066362 ] r10:c001b068 r9:00000000 r8:ee0b02b0 r7:60000113 r6:00000003 r5:02095220 [ 2192.074254 ] r4:c05ca1c0 [ 2192.076809 ] [<c00b67a8>] (__alloc_pages_nodemask) from [<c00b7140>] (__alloc_page_frag+0xb0/0x160) [ 2192.085757 ] r10:c001b068 r9:00000000 r8:ee0b02b0 r7:60000113 r6:02080020 r5:00000740 [ 2192.093650 ] r4:eedbc884 [ 2192.096207 ] [<c00b7090>] (__alloc_page_frag) from [<c03273b4>] (__netdev_alloc_skb+0xa0/0x104) [ 2192.104806 ] r7:60000113 r6:eedbc884 r5:ee0b0000 r4:00000740 [ 2192.110525 ] [<c0327314>] (__netdev_alloc_skb) from [<c02aac00>] (arc_emac_poll+0x318/0x57c) [ 2192.118865 ] r9:00000000 r8:ee0b02b0 r7:0000019c r6:ee163780 r5:00000670 r4:ee0b0000 [ 2192.126683 ] [<c02aa8e8>] (arc_emac_poll) from [<c0339ed8>] (net_rx_action+0x1f0/0x2ec) [ 2192.134590 ] r10:c0599df8 r9:c059a100 r8:00073760 r7:0000012c r6:00000028 r5:c02aa8e8 [ 2192.142483 ] r4:ee0b04e0 [ 2192.145040 ] [<c0339ce8>] (net_rx_action) from [<c0026f5c>] (__do_softirq+0x134/0x258) [ 2192.152860 ] r10:c059a080 r9:40000003 r8:00000003 r7:00000100 r6:c0598000 r5:c059a08c [ 2192.160751 ] r4:00000000 ... Change-Id: Ie7c161809d511bda5d65af7b48fefffff30c07e8 Signed-off-by: Shuyu Wei <sy.w@outlook.com> Tested-by: Michael Niewoehner <linux@mniewoehner.de> Tested-by: Xing Zheng <zhengxing@rock-chips.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexander Kochetkov <al.kochet@gmail.com> Cc: netdev@vger.kernel.org (am from https://patchwork.kernel.org/patch/9032581/) Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.