diff for duplicates of <201503161106270545805@139.com> diff --git a/N1/1.1.hdr b/N1/1.1.hdr new file mode 100644 index 0000000..45d76fc --- /dev/null +++ b/N1/1.1.hdr @@ -0,0 +1,3 @@ +Content-Type: text/plain; + charset="utf-8" +Content-Transfer-Encoding: base64 diff --git a/a/1.txt b/N1/1.1.txt similarity index 94% rename from a/1.txt rename to N1/1.1.txt index 218f16a..434e13e 100644 --- a/a/1.txt +++ b/N1/1.1.txt @@ -7,7 +7,7 @@ I noticed that this way I use in the patch is not very graceful. I will try to -yuweizheng at 139.com +yuweizheng@139.com From: Felix Fietkau Date: 2015-02-19 16:09 @@ -51,6 +51,3 @@ received), while the scheduler ensures that it doesn't interfere with other critical work on the CPU. - Felix --------------- next part -------------- -An HTML attachment was scrubbed... -URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20150316/aab41d90/attachment-0001.htm diff --git a/N1/1.2.bin b/N1/1.2.bin new file mode 100644 index 0000000..bcd402f --- /dev/null +++ b/N1/1.2.bin @@ -0,0 +1,383 @@ +<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"><style>body { line-height: 1.5; }blockquote { margin-top: 0px; margin-bottom: 0px; margin-left: 0.5em; }p { margin-top: 0px; margin-bottom: 0px; }body { font-size: 10.5pt; font-family: 微软雅黑; color: rgb(0, 0, 0); line-height: 1.5; }</style></head><body> +<div><span></span><!--[if gte mso 9]><xml> + <o:OfficeDocumentSettings> + <o:AllowPNG></o:AllowPNG> + </o:OfficeDocumentSettings> 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sans-serif;"><o:p> </o:p></p> +<p class="MsoPlainText" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;">The workqueue will delay the urb submit while the CPU have +no resource to process the wireless packet buffered in the rx_buf. In the +situation, the original driver always submit URBS , this may make more resource be consumed. Furthermore, +the tasklet is in a deadloop, and a soft lockup maybe detect. <o:p></o:p></p> +<p class="MsoPlainText" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></p> +<p class="MsoPlainText" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;">I noticed that this way I use in the patch is not very graceful. + I will try to combine the delayed submit +code to the original rx_tasklet. <o:p></o:p></p> +<!--EndFragment--></div> +<div><br></div><hr style="width: 210px; height: 1px;" color="#b5c4df" size="1" align="left"> +<div><span><div style="MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt"><div>yuweizheng@139.com</div></div></span></div> +<blockquote style="margin-top: 0px; margin-bottom: 0px; margin-left: 0.5em;"><div> </div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div style="PADDING-RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefef; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b> <a href="mailto:nbd@openwrt.org">Felix Fietkau</a></div><div><b>Date:</b> 2015-02-19 16:09</div><div><b>To:</b> <a href="mailto:yuweizheng@139.com">Yuwei Zheng</a>; <a href="mailto:linux-kernel@vger.kernel.org">linux-kernel</a>; <a href="mailto:ath9k-devel@lists.ath9k.org">ath9k-devel</a>; <a href="mailto:linux-wireless@vger.kernel.org">linux-wireless</a>; <a href="mailto:kvalo@codeaurora.org">kvalo</a>; <a href="mailto:ath9k-devel@qca.qualcomm.com">ath9k-devel</a></div><div><b>CC:</b> <a href="mailto:netdev@vger.kernel.org">netdev</a>; <a href="mailto:zhengyuwei@360.cn">zhengyuwei</a></div><div><b>Subject:</b> Re: [PATCHv2] ath9k_htc: add adaptive usb receive flow control to repair soft lockup with monitor mode</div></div></div><div><div>On 2015-02-10 11:34, Yuwei Zheng wrote:</div> +<div>> The ath9k_hif_usb_rx_cb function excute on the interrupt context, and ath9k_rx_tasklet excute</div> +<div>> on the soft irq context. In other words, the ath9k_hif_usb_rx_cb have more chance to excute than</div> +<div>> ath9k_rx_tasklet. So in the worst condition, the rx.rxbuf receive list is always full,</div> +<div>> and the do {}while(true) loop will not be break. The kernel get a soft lockup panic. </div> +<div>> </div> +<div>> [59011.007210] BUG: soft lockup - CPU#0 stuck for 23s!</div> +<div>> [kworker/0:0:30609]</div> +<div>> [59011.030560] BUG: scheduling while atomic: kworker/0:0/30609/0x40010100</div> +<div>> [59013.804486] BUG: scheduling while atomic: kworker/0:0/30609/0x40010100</div> +<div>> [59013.858522] Kernel panic - not syncing: softlockup: hung tasks</div> +<div>> </div> +<div>> [59014.038891] Exception stack(0xdf4bbc38 to 0xdf4bbc80)</div> +<div>> [59014.046834] bc20: de57b950 60000113</div> +<div>> [59014.059579] bc40: 00000000 bb32bb32 60000113 de57b948 de57b500 dc7bb440 df4bbcd0 00000000</div> +<div>> [59014.072337] bc60: de57b950 60000113 df4bbcd0 df4bbc80 c04c259d c04c25a0 60000133 ffffffff</div> +<div>> [59014.085233] [<c04c28db>] (__irq_svc+0x3b/0x5c) from [<c04c25a0>] (_raw_spin_unlock_irqrestore+0xc/0x10)</div> +<div>> [59014.100437] [<c04c25a0>] (_raw_spin_unlock_irqrestore+0xc/0x10) from [<bf9c2089>] (ath9k_rx_tasklet+0x290/0x490 [ath9k_htc])</div> +<div>> [59014.118267] [<bf9c2089>] (ath9k_rx_tasklet+0x290/0x490 [ath9k_htc]) from [<c0036d23>] (tasklet_action+0x3b/0x98)</div> +<div>> [59014.134132] [<c0036d23>] (tasklet_action+0x3b/0x98) from [<c0036709>] (__do_softirq+0x99/0x16c)</div> +<div>> [59014.147784] [<c0036709>] (__do_softirq+0x99/0x16c) from [<c00369f7>] (irq_exit+0x5b/0x5c)</div> +<div>> [59014.160653] [<c00369f7>] (irq_exit+0x5b/0x5c) from [<c000cfc3>] (handle_IRQ+0x37/0x78)</div> +<div>> [59014.173124] [<c000cfc3>] (handle_IRQ+0x37/0x78) from [<c00085df>] (omap3_intc_handle_irq+0x5f/0x68)</div> +<div>> [59014.187225] [<c00085df>] (omap3_intc_handle_irq+0x5f/0x68) from [<c04c28db>](__irq_svc+0x3b/0x5c)</div> +<div>> </div> +<div>> This bug can be see with low performance board, such as uniprocessor beagle bone board. Add some debug </div> +<div>> message in the ath9k_hif_usb_rx_cb function may trigger this bug quickly.</div> +<div>> </div> +<div>> Signed-off-by: Yuwei Zheng <yuweizheng@139.com></div> +<div>This approach of interaction between tasklet and workqueue processing</div> +<div>seems quite complex to me. Wouldn't it be simpler and better to simply</div> +<div>always run the rx processing code in workqueue context?</div> +<div>That way it can go on processing forever (as long as there is data to be</div> +<div>received), while the scheduler ensures that it doesn't interfere with</div> +<div>other critical work on the CPU.</div> +<div> </div> +<div>- Felix</div> +</div></blockquote> +</body></html> diff --git a/N1/1.2.hdr b/N1/1.2.hdr new file mode 100644 index 0000000..03e4d4a --- /dev/null +++ b/N1/1.2.hdr @@ -0,0 +1,3 @@ +Content-Type: text/html; + charset="utf-8" +Content-Transfer-Encoding: quoted-printable diff --git a/N1/2.hdr b/N1/2.hdr new file mode 100644 index 0000000..4b86001 --- /dev/null +++ b/N1/2.hdr @@ -0,0 +1,4 @@ +Content-Type: text/plain; charset="us-ascii" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +Content-Disposition: inline diff --git a/N1/2.txt b/N1/2.txt new file mode 100644 index 0000000..f40853a --- /dev/null +++ b/N1/2.txt @@ -0,0 +1,4 @@ +_______________________________________________ +ath9k-devel mailing list +ath9k-devel@lists.ath9k.org +https://lists.ath9k.org/mailman/listinfo/ath9k-devel diff --git a/a/content_digest b/N1/content_digest index 64f5a8b..cffd272 100644 --- a/a/content_digest +++ b/N1/content_digest @@ -1,10 +1,16 @@ "ref\01423528464-8433-1-git-send-email-yuweizheng@139.com\0" "ref\054E59A57.402@openwrt.org\0" - "From\0yuweizheng at 139.com <yuweizheng@139.com>\0" - "Subject\0[ath9k-devel] [PATCHv2] ath9k_htc: add adaptive usb receive flow control to repair soft lockup with monitor mode\0" + "From\0yuweizheng@139.com <yuweizheng@139.com>\0" + "Subject\0Re: [PATCHv2] ath9k_htc: add adaptive usb receive flow control to repair soft lockup with monitor mode\0" "Date\0Mon, 16 Mar 2015 11:06:27 +0800\0" - "To\0ath9k-devel@lists.ath9k.org\0" - "\00:1\0" + "To\0Felix Fietkau <nbd@openwrt.org>" + linux-kernel <linux-kernel@vger.kernel.org> + ath9k-devel <ath9k-devel@lists.ath9k.org> + linux-wireless 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start follow this patch. <o:p></o:p></p>\r\n" + "<p class=\"MsoPlainText\" style=\"margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;\"><o:p> </o:p></p>\r\n" + "<p class=\"MsoPlainText\" style=\"margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;\">The workqueue will delay the urb submit while the CPU have\r\n" + "no resource to process the wireless packet buffered in the rx_buf. In the\r\n" + "situation, the original driver always submit URBS , this may make more resource be consumed. Furthermore,\r\n" + "the tasklet is in a deadloop, and a soft lockup maybe detect. <o:p></o:p></p>\r\n" + "<p class=\"MsoPlainText\" style=\"margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;\"><o:p> </o:p></p>\r\n" + "<p class=\"MsoPlainText\" style=\"margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;\">I noticed that this way I use in the patch is not very graceful.\r\n" + " I will try to combine the delayed submit\r\n" + "code to the original rx_tasklet. <o:p></o:p></p>\r\n" + "<!--EndFragment--></div>\r\n" + "<div><br></div><hr style=\"width: 210px; height: 1px;\" color=\"#b5c4df\" size=\"1\" align=\"left\">\r\n" + "<div><span><div style=\"MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt\"><div>yuweizheng@139.com</div></div></span></div>\r\n" + "<blockquote style=\"margin-top: 0px; margin-bottom: 0px; margin-left: 0.5em;\"><div> </div><div style=\"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm\"><div style=\"PADDING-RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefef; PADDING-BOTTOM: 8px; PADDING-TOP: 8px\"><div><b>From:</b> <a href=\"mailto:nbd@openwrt.org\">Felix Fietkau</a></div><div><b>Date:</b> 2015-02-19 16:09</div><div><b>To:</b> <a href=\"mailto:yuweizheng@139.com\">Yuwei Zheng</a>; <a href=\"mailto:linux-kernel@vger.kernel.org\">linux-kernel</a>; <a href=\"mailto:ath9k-devel@lists.ath9k.org\">ath9k-devel</a>; <a href=\"mailto:linux-wireless@vger.kernel.org\">linux-wireless</a>; <a href=\"mailto:kvalo@codeaurora.org\">kvalo</a>; <a href=\"mailto:ath9k-devel@qca.qualcomm.com\">ath9k-devel</a></div><div><b>CC:</b> <a href=\"mailto:netdev@vger.kernel.org\">netdev</a>; <a href=\"mailto:zhengyuwei@360.cn\">zhengyuwei</a></div><div><b>Subject:</b> Re: [PATCHv2] ath9k_htc: add adaptive usb receive flow control to repair soft lockup with monitor mode</div></div></div><div><div>On 2015-02-10 11:34, Yuwei Zheng wrote:</div>\r\n" + "<div>> The ath9k_hif_usb_rx_cb function excute on the interrupt context, and ath9k_rx_tasklet excute</div>\r\n" + "<div>> on the soft irq context. In other words, the ath9k_hif_usb_rx_cb have more chance to excute than</div>\r\n" + "<div>> ath9k_rx_tasklet. So in the worst condition, the rx.rxbuf receive list is always full,</div>\r\n" + "<div>> and the do {}while(true) loop will not be break. The kernel get a soft lockup panic. </div>\r\n" + "<div>> </div>\r\n" + "<div>> [59011.007210] BUG: soft lockup - CPU#0 stuck for 23s!</div>\r\n" + "<div>> [kworker/0:0:30609]</div>\r\n" + "<div>> [59011.030560] BUG: scheduling while atomic: kworker/0:0/30609/0x40010100</div>\r\n" + "<div>> [59013.804486] BUG: scheduling while atomic: kworker/0:0/30609/0x40010100</div>\r\n" + "<div>> [59013.858522] Kernel panic - not syncing: softlockup: hung tasks</div>\r\n" + "<div>> </div>\r\n" + "<div>> [59014.038891] Exception stack(0xdf4bbc38 to 0xdf4bbc80)</div>\r\n" + "<div>> [59014.046834] bc20: de57b950 60000113</div>\r\n" + "<div>> [59014.059579] bc40: 00000000 bb32bb32 60000113 de57b948 de57b500 dc7bb440 df4bbcd0 00000000</div>\r\n" + "<div>> [59014.072337] bc60: de57b950 60000113 df4bbcd0 df4bbc80 c04c259d c04c25a0 60000133 ffffffff</div>\r\n" + "<div>> [59014.085233] [<c04c28db>] (__irq_svc+0x3b/0x5c) from [<c04c25a0>] (_raw_spin_unlock_irqrestore+0xc/0x10)</div>\r\n" + "<div>> [59014.100437] [<c04c25a0>] (_raw_spin_unlock_irqrestore+0xc/0x10) from [<bf9c2089>] (ath9k_rx_tasklet+0x290/0x490 [ath9k_htc])</div>\r\n" + "<div>> [59014.118267] [<bf9c2089>] (ath9k_rx_tasklet+0x290/0x490 [ath9k_htc]) from [<c0036d23>] (tasklet_action+0x3b/0x98)</div>\r\n" + "<div>> [59014.134132] [<c0036d23>] (tasklet_action+0x3b/0x98) from [<c0036709>] (__do_softirq+0x99/0x16c)</div>\r\n" + "<div>> [59014.147784] [<c0036709>] (__do_softirq+0x99/0x16c) from [<c00369f7>] (irq_exit+0x5b/0x5c)</div>\r\n" + "<div>> [59014.160653] [<c00369f7>] (irq_exit+0x5b/0x5c) from [<c000cfc3>] (handle_IRQ+0x37/0x78)</div>\r\n" + "<div>> [59014.173124] [<c000cfc3>] (handle_IRQ+0x37/0x78) from [<c00085df>] (omap3_intc_handle_irq+0x5f/0x68)</div>\r\n" + "<div>> [59014.187225] [<c00085df>] (omap3_intc_handle_irq+0x5f/0x68) from [<c04c28db>](__irq_svc+0x3b/0x5c)</div>\r\n" + "<div>> </div>\r\n" + "<div>> This bug can be see with low performance board, such as uniprocessor beagle bone board. Add some debug </div>\r\n" + "<div>> message in the ath9k_hif_usb_rx_cb function may trigger this bug quickly.</div>\r\n" + "<div>> </div>\r\n" + "<div>> Signed-off-by: Yuwei Zheng <yuweizheng@139.com></div>\r\n" + "<div>This approach of interaction between tasklet and workqueue processing</div>\r\n" + "<div>seems quite complex to me. Wouldn't it be simpler and better to simply</div>\r\n" + "<div>always run the rx processing code in workqueue context?</div>\r\n" + "<div>That way it can go on processing forever (as long as there is data to be</div>\r\n" + "<div>received), while the scheduler ensures that it doesn't interfere with</div>\r\n" + "<div>other critical work on the CPU.</div>\r\n" + "<div> </div>\r\n" + "<div>- Felix</div>\r\n" + "</div></blockquote>\r\n" + </body></html> + "\01:2\0" + "b\0" + "_______________________________________________\n" + "ath9k-devel mailing list\n" + "ath9k-devel@lists.ath9k.org\n" + https://lists.ath9k.org/mailman/listinfo/ath9k-devel -cfd0f87513a0fe9a15f06e66b2c6fc3a60e5faf6db5e45611eb7ab8f03c7c5c5 +a7099433d993d9652bcb04fc8148f20469042be276f494af8e9a8785ab97db67
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