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X-MS-Exchange-CrossTenant-Id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: +yUlfiFrq9kREnPrBSps1VOLiC+FLdkSnypElT58EmqSQt9R1ASuJ3v1BYka0Co7a17Feft8TAKSlfZD5EoZlKbCy57HMfoCzmBpBrIcnpM= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR04MB8180 On 7/22/26 9:01 PM, Boris Burkov wrote: > Furthermore, I feel like this is actually quite redundant with the whole > EBUSY pivot logic. > > So for random reclaim writeback, we walk the ebs in index order and skip > any not in the active bg if the active bg has dirty ebs. Then we reach > the active bg and flush it, submitting everything. Subsequent tries to > writeback the non-active will now wait on that submitted IO and > ultimately win and get to become active, and do more submission. > > But we could save the bother and make things more direct and simple if > we just had btree_writepages() always write out the active bg first then > the rest. I don't know if we could fully delete the EBUSY, though, maybe > there is some racy case where it would still happen a bit, even if > mostly it didn't? I got a v2 with your comments (and Sashiko's) addressed. I can look into that as well, but that feels a bit more involved and we're seeing random hangs in our CI system due to these stalled folios and we have one report on the list because of the hole -EAGAIN, so I'd like to get it (hot-)fixed possibly in this cycle and take care about that once the hotfix is there. How does that sound?