Cross Reference: /src/sys/kern/subr_lwp

History log of /src/sys/kern/subr_lwp_specificdata.c
Revision	Date	Author	Comments
1.5	01-Sep-2024	andvar	s/specifc/specific/ in comments.
1.4	17-May-2019	ozaki-r	branches: 1.4.34; Implement an aggressive psref leak detector It is yet another psref leak detector that enables to tell where a leak occurs while a simpler version that is already committed just tells an occurrence of a leak. Investigating of psref leaks is hard because once a leak occurs a percpu list of psref that tracks references can be corrupted. A reference to a tracking object is memorized in the list via an intermediate object (struct psref) that is normally allocated on a stack of a thread. Thus, the intermediate object can be overwritten on a leak resulting in corruption of the list. The tracker makes a shadow entry to an intermediate object and stores some hints into it (currently it's a caller address of psref_acquire). We can detect a leak by checking the entries on certain points where any references should be released such as the return point of syscalls and the end of each softint handler. The feature is expensive and enabled only if the kernel is built with PSREF_DEBUG. Proposed on tech-kern
1.3	25-Oct-2013	martin	branches: 1.3.30; Mark a diagnostic-only variable
1.2	12-Apr-2010	christos	branches: 1.2.2; 1.2.4; 1.2.6; 1.2.14; 1.2.24; 1.2.28; void police!
1.1	12-Apr-2010	pooka	Separate lwp specificdata data structure management from lwp cpu/vm management. No functional change. (specificdata routines went from kern_lwp.c to subr_lwp_specificdata.c)
1.2.28.1	18-May-2014	rmind	sync with head
1.2.24.1	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.2.14.1	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.2.6.2	11-Aug-2010	yamt	sync with head.
1.2.6.1	12-Apr-2010	yamt	file subr_lwp_specificdata.c was added on branch yamt-nfs-mp on 2010-08-11 22:54:42 +0000
1.2.4.2	30-May-2010	rmind	sync with head
1.2.4.1	12-Apr-2010	rmind	file subr_lwp_specificdata.c was added on branch rmind-uvmplock on 2010-05-30 05:17:58 +0000
1.2.2.2	30-Apr-2010	uebayasi	Sync with HEAD.
1.2.2.1	12-Apr-2010	uebayasi	file subr_lwp_specificdata.c was added on branch uebayasi-xip on 2010-04-30 14:44:12 +0000
1.3.30.1	10-Jun-2019	christos	Sync with HEAD
1.4.34.1	02-Aug-2025	perseant	Sync with HEAD

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