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Wed, 26 Feb 2025 08:38:43 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id zYeAGxPTvmdcSgAAD6G6ig (envelope-from ); Wed, 26 Feb 2025 08:38:43 +0000 Date: Wed, 26 Feb 2025 09:38:42 +0100 Message-ID: <87jz9d5cdp.wl-tiwai@suse.de> From: Takashi Iwai To: Chuck Lever Cc: Takashi Iwai , regressions@lists.linux.dev, linux-fsdevel@vger.kernel.org, stable@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [REGRESSION] Chrome and VSCode breakage with the commit b9b588f22a0c In-Reply-To: References: <874j0lvy89.wl-tiwai@suse.de> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/27.2 Mule/6.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: B59AD1F387 X-Spam-Score: -3.51 X-Rspamd-Action: no action X-Spamd-Result: default: False [-3.51 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; ASN(0.00)[asn:25478, ipnet:::/0, country:RU]; TO_DN_SOME(0.00)[]; MIME_TRACE(0.00)[0:+]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_FIVE(0.00)[6]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:dkim,suse.com:url,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO X-Spam-Level: On Sun, 23 Feb 2025 16:18:41 +0100, Chuck Lever wrote: > > On 2/23/25 3:53 AM, Takashi Iwai wrote: > > [ resent due to a wrong address for regression reporting, sorry! ] > > > > Hi, > > > > we received a bug report showing the regression on 6.13.1 kernel > > against 6.13.0. The symptom is that Chrome and VSCode stopped working > > with Gnome Scaling, as reported on openSUSE Tumbleweed bug tracker > > https://bugzilla.suse.com/show_bug.cgi?id=1236943 > > > > Quoting from there: > > """ > > I use the latest TW on Gnome with a 4K display and 150% > > scaling. Everything has been working fine, but recently both Chrome > > and VSCode (installed from official non-openSUSE channels) stopped > > working with Scaling. > > .... > > I am using VSCode with: > > `--enable-features=UseOzonePlatform --enable-features=WaylandWindowDecorations --ozone-platform-hint=auto` and for Chrome, I select `Preferred Ozone platform` == `Wayland`. > > """ > > > > Surprisingly, the bisection pointed to the backport of the commit > > b9b588f22a0c049a14885399e27625635ae6ef91 ("libfs: Use d_children list > > to iterate simple_offset directories"). > > > > Indeed, the revert of this patch on the latest 6.13.4 was confirmed to > > fix the issue. Also, the reporter verified that the latest 6.14-rc > > release is still affected, too. > > > > For now I have no concrete idea how the patch could break the behavior > > of a graphical application like the above. Let us know if you need > > something for debugging. (Or at easiest, join to the bugzilla entry > > and ask there; or open another bug report at whatever you like.) > > > > BTW, I'll be traveling tomorrow, so my reply will be delayed. > > > > > > thanks, > > > > Takashi > > > > #regzbot introduced: b9b588f22a0c049a14885399e27625635ae6ef91 > > #regzbot monitor: https://bugzilla.suse.com/show_bug.cgi?id=1236943 > > We received a similar report a few days ago, and are likewise puzzled at > the commit result. Please report this issue to the Chrome development > team and have them come up with a simple reproducer that I can try in my > own lab. I'm sure they can quickly get to the bottom of the application > stack to identify the misbehaving interaction between OS and app. Do you know where to report to? The reported stuff are no distro packages, and I myself have no experience with them, hence have no idea about the upstream development. If you have more clue about Chrome development, it'd be appreciated if you can report / ask from your side. Of course, feel free to put me to Cc. thanks, Takashi