[lkml]   [2018]   [Jul]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v5 06/10] Uprobes: Support SDT markers having reference count (semaphore)
On 07/03, Oleg Nesterov wrote:
> In short. There is a 1:1 relationship between uprobe_write_opcode(is_register => 1)
> and install_breakpoint(), and between uprobe_write_opcode(is_register => 0) and
> remove_breakpoint(). Whatever uprobe_write_opcode() can do if is_register == 1 can be
> done in install_breakpoint(), the same for is_register == 0 and remove_breakpont().
> What have I missed?

Ah. I missed the fact that uprobe_write_opcode() doesn't do update_ref_ctr() if
verify_opcode() returns false.

Now I understand what did you mean by "for each consumer". So if we move this logic
into install/remove_breakpoint as I tried to suggest, we will also need another error
code for the case when verify_opcode() returns false.


 \ /
  Last update: 2018-07-03 19:26    [W:0.170 / U:2.196 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site