Bug 439797
| Summary: | [CRM 1067838] Customer would like increase max number of X server connections | ||||||||||
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| Product: | Red Hat Enterprise Linux 5 | Reporter: | Alan Matsuoka <alanm> | ||||||||
| Component: | xorg-x11-server | Assignee: | Adam Jackson <ajax> | ||||||||
| Status: | CLOSED ERRATA | QA Contact: | |||||||||
| Severity: | medium | Docs Contact: | |||||||||
| Priority: | high | ||||||||||
| Version: | 5.2 | CC: | cward, mgordon, ofourdan, rlerch, syeghiay, tao, xgl-maint, zcerza | ||||||||
| Target Milestone: | rc | ||||||||||
| Target Release: | --- | ||||||||||
| Hardware: | All | ||||||||||
| OS: | Linux | ||||||||||
| Whiteboard: | |||||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||||
| Doc Text: | Story Points: | --- | |||||||||
| Clone Of: | |||||||||||
| : | 511125 (view as bug list) | Environment: | |||||||||
| Last Closed: | 2009-09-02 11:42:25 UTC | Type: | --- | ||||||||
| Regression: | --- | Mount Type: | --- | ||||||||
| Documentation: | --- | CRM: | |||||||||
| Verified Versions: | Category: | --- | |||||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||||
| Embargoed: | |||||||||||
| Bug Depends On: | 511913 | ||||||||||
| Bug Blocks: | 391501, 511125 | ||||||||||
| Attachments: |
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Description
Alan Matsuoka
2008-03-31 14:14:55 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. Created attachment 340512 [details] Proposed patch to make the maximum number of clients user configurable This is the same as bug #490951 on el4, ported to xserver-1.1.1 on el5 See comment 4 in bug #490951 for the logic of the patch. https://bugzilla.redhat.com/show_bug.cgi?id=490951#c4 Created attachment 340719 [details]
Proposed patch
Updated patch for el5, this patch fixes an issue with the Xorg.conf "MaxClients" option and adds a message in the log.
Created attachment 340722 [details]
Proposed patch
Updated patch, typo.
Applied to -48.59.el5 MODIFIED ~~ Attention - RHEL 5.4 Beta Released! ~~ RHEL 5.4 Beta has been released! There should be a fix present in the Beta release that addresses this particular request. Please test and report back results here, at your earliest convenience. RHEL 5.4 General Availability release is just around the corner! If you encounter any issues while testing Beta, please describe the issues you have encountered and set the bug into NEED_INFO. If you encounter new issues, please clone this bug to open a new issue and request it be reviewed for inclusion in RHEL 5.4 or a later update, if it is not of urgent severity. Please do not flip the bug status to VERIFIED. Only post your verification results, and if available, update Verified field with the appropriate value. Questions can be posted to this bug or your customer or partner representative. I don't see the "Xlib: Maximum number of clients reached" error up to the defined MaxClients (I'm using 512), but I'm only actually able to start around 256 clients (testing using a bash loop to open numbered zenity windows). Beyond that, things fail silently. Under Gnome, I can open 224 zenity windows, and under a failsafe terminal session, I can open 245 zenity windows. This is with xorg-x11-server-Xorg-1.1.1-48.64.el5. XFD_SETSIZE needs to be increased to 512 too in Xproto.h which is part of another package on el5 (xorg-x11-proto-devel-7.1) With XFD_SETSIZE at 512 it works, I get up to 493 xlogo. Sorry, I meant increasing XFD_SETSIZE to 512 in *Xpoll.h* from xorg-x11-proto-devel and after rebuild the X server with the new value for XFD_SETSIZE. We don't have an errata slot open for rebuilding -proto-devel for 5.4. Will work around this in the X server for now and fix properly in 5.5. Minimally tested fix built locally. With Xvfb -ac -maxclients 512, I can run 300 xlogos, and still get output from xdpyinfo, indicating that clients above 256 are responsive as you'd expect. built xorg-x11-server-1.1.1-48.66.el5 MODIFIED This is now working as one would expect. Server performance can suffer greatly when too many clients are open, even when there's sufficient RAM, but there's no longer an arbitrary limit of 256 clients. Release note added. If any revisions are required, please set the "requires_release_notes" flag to "?" and edit the "Release Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Previously, the XFD_SETSIZE value in the Xpoll.h header file was set to allow only 256 X client connections for a single X server. Consequently, if this limit was reached, the X Server would silently deny new connections. With this update, the XFD_SETSIZE has been modified to support a maximum of 512 X client connections. The X server supplied in Red Hat Enterprise Linux 5.4 has been built with this limit increase included. Deleted Release Notes Contents. Old Contents: Previously, the XFD_SETSIZE value in the Xpoll.h header file was set to allow only 256 X client connections for a single X server. Consequently, if this limit was reached, the X Server would silently deny new connections. With this update, the XFD_SETSIZE has been modified to support a maximum of 512 X client connections. The X server supplied in Red Hat Enterprise Linux 5.4 has been built with this limit increase included. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2009-1373.html |